Add function rollback

* Added function rollback
9 jobs for rollback in 2 minutes and 32 seconds (queued for 7 minutes and 46 seconds)
Status Job ID Name Coverage
  Lint
passed #5183
lint:lint-php5.4

00:00:32

passed #5184
lint:lint-php5.6

00:00:32

passed #5185
lint:lint-php7.0

00:00:33

passed #5186
lint:lint-php7.1

00:00:28

 
  Codesniffer
passed #5187
codesniffer

00:00:35

 
  Unit
passed #5188
unit:testBasic

00:00:41

passed #5189
unit:testRead

00:00:41

passed #5190
unit:testReadAssertFail

00:00:34

passed #5191
unit:testUserProperty

00:00:37