Delete node / delete environment should use env snapshot

It turned out there is no need to deploy simple environment
for delete xxx tests.

Change-Id: I518f861ffa8955bbe29013ca9313641a1f82fef3
Logging to multiple destination

Change-Id: Idc26893e618054dcd958f8fc9b4c804634950e6e
Merge "Delete node / delete environment should use env snapshot" into stable/4.1
Merge "Logging to multiple destination" into stable/4.1