Refactor to use common library from runtime operator

[edavidj]

What this PR does / why we need it?:

• Removes pkg/utils and pkg/common from appsody operator. May need to recreate the utils package down the line for appsody specific utilities, similar to how OL operator functions.
• Includes changes directly to the runtime component CRD and controller, necessary to build appsody with that repos utilities/common libraries. (Sidecar containers, cert secret ref, ApplicationName, etc.)
• If there are additional changes that I missed and should be picking up in this PR let me know

Does this PR introduce a user-facing change?

• [ ] User guide
• [ ] CHANGELOG.md

Which issue(s) this PR fixes:

Fixes #235

[leochr]

@edavidj Thanks for the PR. Looks good. Some additional changes made to RC operator:

• sidecarContainer description was revised in RC operator's user guide
• additional content about shortname

@navidsh @arturdzm @JusteenR Please review to ensure the functionalities you delivered to RC operator are reflected correctly. Thank you.