Prevent reference ID error with push SF activities for point changes and other timeline events

[alanhartless]

Q	A
Bug fix?	y
New feature?
Automated tests included?	y
Related user documentation PR URL
Related developer documentation PR URL
Issues addressed (#s or URLs)
BC breaks?
Deprecations?

Description:

Some of the time line events did not have an eventId assigned by the subscriber which was used by the SF activity sync to generate a reference ID. If this was not set, the SF activity sync would generate a reference id of -SOMESTRING which triggered the error provided reference ID must start with an alphanumeric character and can not contain a period. This PR fixes that by fixing the few timeline events that were missing an eventId but also generates one if the subscriber forgets to generate one.

Steps to reproduce the bug:

1. Setup SF Activity syncing
2. Ensure that a Mautic contact is being tracked against a SF lead or contact
3. Create a form with a point change submit action
4. Submit the form with the email of the contact in step 2
5. Run the m:i:pushactivity command and not the reference ID error

Steps to test this PR:

1. Repeat and activity will be synced

[javjim]

Working properly,
Guide to setup SF https://mautic.com/help/salesforce-integration-setup/