TxManager used to commit/rollback transactions
Merge pull request #3295 from lutovich/2.0-lock-release-during-db-shutdown

[2.0] TxManager used to commit/rollback transactions
Merge commit '4d0c1e24d2c660891b656ec25405baf3d33677be' into merge-2.0-to-2.1

Conflicts:
	community/kernel/src/main/java/org/neo4j/kernel/TopLevelTransaction.java
Merge pull request #3316 from lutovich/merge-2.0-to-2.1

Merge 2.0 to 2.1