Hardcode in the migrations directory

It's pratically never going to be the case that the migrations
do not live in their default location.
CSP should not need to be altered

The CSP policy of Warehouse is pretty much set in stone for any
particular version. We should not need to support altering it.
Fix the tests and remove some old settings
Simplify the logging configuration
Configure logging before doing (much) else
Merge pull request #213 from dstufft/deconfigure

Simplify the Configuration File