[Reference][Forms] Fix options type for hours, minutes, seconds
[Reference][Forms] Fix typo introduced in previous commit
Added limitations in 'Managing Common Dependencies with Parent Services' with a caution
Typo fixed
Merge pull request #2496 from michaelperrin/bugfix/datetime-time-options-fixes

[Reference][Forms] Fix options type for hours, minutes, seconds
Merge pull request #2502 from venu/adding_caution_parentservices

Added limitations in 'Managing Common Dependencies with Parent Services'...
[#2502] Minor tweaks to parent services note
Fixing syntax error
Merge branch '2.0' into 2.1
Merge branch '2.1' into 2.2
Merge remote-tracking branch 'origin/2.2' into 2.2
Symfony 2.2 renamed TimeDataCollector::getTotalTime() to getDuration()