Set the main logger name to match the application

Change the main logger to use the application's name instead of
'cliff.app' so that unhandled errors reported as oneliners come out as
"ERROR: myapp some problem happened" instead of
"ERROR: cliff.app some problem happened".

Change-Id: I7d31cb8c1700984e6bd951ee05817b2e6a915da4
Closes-bug: #1348648
Merge "Set the main logger name to match the application"