Update hello world ruby template

[lauratpa]

First of all, thank you for this wonderful tool!

I tried out the hello world app for ruby, and it works nicely! But I discovered that the test that was written for this example isn't capable of running.

Description of changes:

• Update the test, so that it tests the functionality and passes
• Put testing gems to the Gemfile, so that we can use bundler to manage these gems
• Remove whitespace

Checklist:

• Write Design Document (Do I need to write a design document?)
• Write unit tests
• Write/update functional tests
• Write/update integration tests
• make pr passes
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[phstc]

@lauratpa should bundle install also skip development?

bundle install --deployment --path hello_world/vendor/bundle --without development test

[lauratpa]

Yeah, it makes sense that one does not want development gems in production deployment. But I didn't add it because the example Gemfile does not have development group and I don't want to confuse anyone. Makes sense?

[awood45]

I'm looking at incorporating this into another PR I'm working on right now - or it will need to be rebased. The current project structure from sam init doesn't work with sam build, so some files are gonna get moved...

[awood45]

#866 has pulled in the changes in this PR, generally.

[sriram-mv]

Thanks for making the changes! these look to be good. I see #866 has pulled in these changes along with adding support for ruby in sam build.

[lauratpa]

@awood45 @thesriram I see that my changes were pulled to the new PR. I'll close this PR now in that case. Thanks, waiting to try out the feature!

[awood45]

Thank you so much for improving the examples!