Log translation hint for Heat.tests

Currently, Log translation is motivated by oslo's move to prioritized
translation of strings, as documented at
https://wiki.openstack.org/wiki/LoggingStandards#Log_Translation

- add log translation hints for warning, error and info levels
- move from LOG.warning to LOG.warn
- remove use of % as a string formatter, use the log functionality
  instead

Partial implements blueprint log-translation-hints

Change-Id: Ia961196df09d301b4c384ffe51413ffc5c15164e
warn against sorting requirements

And do not check for sorted files.

Change-Id: I64ae9191863564e278a35d42ec9cd743a233028e
Closes-Bug: 1365061
Log translation hint for Heat.common

Currently, Log translation is motivated by oslo's move to prioritized
translation of strings, as documented at
https://wiki.openstack.org/wiki/LoggingStandards#Log_Translation

- add log translation hints for warning, error and info levels
- move from LOG.warning to LOG.warn
- remove use of % as a string formatter, use the log functionality
  instead

Partial implements blueprint log-translation-hints

Change-Id: I715f69154bd199dabac7d537b982b875204f8b33
Implement AWS::EC2::EIPAssociation updatable

Change-Id: Iedb9a1a42e134e9c524311747d6253a0199ac1d4
Merge "warn against sorting requirements"
Merge "Log translation hint for Heat.common"
Merge "Log translation hint for Heat.tests"