fixed connection release on excpetion.

Conflicts:
	client/src/main/java/com/orientechnologies/orient/client/remote/OSBTreeBonsaiRemote.java
	client/src/main/java/com/orientechnologies/orient/client/remote/OSBTreeCollectionManagerRemote.java
	client/src/main/java/com/orientechnologies/orient/client/remote/OServerAdmin.java
	client/src/main/java/com/orientechnologies/orient/client/remote/OStorageRemote.java