* stable-2.15:
Make zip generation (more) reproducible
Make _bower_archive rule deterministic
Remove duplication between both index modules
Add more debug logging to account creation
Delete index after each test in elasticsearch tests
AccountManager: Reduce logs to debug level
AccountManager: Use Logger's built-in string formatting
Documentation: clarify what happens if you override a label in a child.
Prolog cookbook: fix several examples.
Change-Id: I53dd1ec43c6fc019bfac76a9606fdca97eb5e6f0