Multiple fixes for stability
 - Adding option to prevent rollback in case of successful execution of a destructive operation that is not reversible (deleting gear or deconfiguring cartridge on the node)
 - Checking for the existence of the application after obtaining the lock
 - Reloading the application after acquiring the lock to reflect any changes made by the previous operation holding the lock
 - Using regular run_jobs code in clear-pending-ops script
 - Handling DocumentNotFound exception in clear-pending-ops script if the application is deleted
Checking for empty string in ObjectId
Deleting applications on app creation rollbacks
Require -recommended metapackages from -optional cart deps

Most users will want the recommended cartridge dependencies when
installing the optional cartridge dependency metapackage(s).
Added max_teams capability
Merge pull request #4857 from lnader/master

Merged by openshift-bot
Merge pull request #4916 from dobbymoodge/opt-req-rec

Merged by openshift-bot
Merge pull request #4840 from abhgupta/abhgupta-dev

Merged by openshift-bot