Added the folder skeleton for stacktach tests.
Added stacktach fixture file - StackTachFixture and StackTachDBFixture.
Fixed pep8 issues.
Modified misc_config to be standard Marshalling.
Reordered imports

Change-Id: I97fb1a9732e8f01fc44d4c85095f9ba14ba448ab
Merge "Added the folder skeleton for stacktach tests. Added stacktach fixture file - StackTachFixture and StackTachDBFixture. Fixed pep8 issues. Modified misc_config to be standard Marshalling. Reordered imports"