Adjusted audit logging for taskmanager module

The taskmanager module audit log messages are unclear, some debug
messages are supposed to be info and vice versa.

Changed logging of various messages to conform to standard.

Change-Id: Idaa46b67096c1fbbacdf730c06c823aaf3e1e255
Partial-Bug: #1324206
Merge "Adjusted audit logging for taskmanager module"