Enhancement/email use owner setting

[Travisimo]

Please be sure you are submitting this against the staging branch.

Q	A
Bug fix?	N
New feature?	Y (Enhancement)
Automated tests included?	Y
Related user documentation PR URL
Related developer documentation PR URL
Issues addressed (#s or URLs)	fixes #4170, fixes #6425, Forum Post
BC breaks?
Deprecations?

Description: This is a new pull request based off of discussion from PR #6004. The "Use Owner As Mailer" setting has been added to the email template, adding more refined control for emails. The global config setting will now only act as a default settings for new emails. Emails can now individually have this feature toggled.

Steps to reproduce the bug:

1. Set "Mailer is owner" flag to true (On) in Configuration -> Email
2. Set from address on custom email attached to campaign
3. Trigger campaign to send out email
4. Email from address is populated with owner email instead of the defined custom email

Steps to test this PR:

Apply this PR and then apply the migration using bin/console doctrine:migrations:execute --up 20180508202930

1. Set "Mailer is owner" flag to false (No) in Eamil-> Advanced Settings
2. Set from address on custom email attached to campaign
3. Trigger campaign to send out email
4. Email from address uses defined custom from address if available
5. If custom from address is not populated, use owner email if available, else use system default.
   Revoke the migration if required using bin/console doctrine:migrations:execute --down 20180508202930

List deprecations along with the new alternative:

List backwards compatibility breaks:

[alanhartless]

@Travisimo Thanks for doing this! I haven't tested this yet but just pointed out that it broke one of the tests. https://travis-ci.org/mautic/mautic/builds/377062056?utm_source=github_status&utm_medium=notification Let's make sure it didn't introduce a bug.

[Travisimo]

@alanhartless Of course! Thanks for the suggestion and help along the way. The bug has been resolved.

[npracht]

Label: Enhancement

[escopecz]

I found some tiny issues. Please resolve them and I'll test it then.

[Travisimo]

@escopecz thanks for the feedback! I will get to work on fixing those issues.

[Travisimo]

@escopecz I have fixed the issues you have pointed out

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: tmoheit.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[kuzmany]

I've resolved conflicts.
Based on our discution with Ruth, we can continue with tests

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: tmoheit.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: tmoheit.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: tmoheit.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: tmoheit.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: tmoheit.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[RCheesley]

Updated the docs to reflect the 3.3 release, should be good to go once branch is updated and tests are passing.

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: tmoheit.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails