Move mysql_wmf into a module.

The manifest changes here are pretty brainless -- I split the major
classes into separate files and rearranged the file and template
includes to reflect the new position of the source files.

I also moved quite a few files that were filed under ganglia
or icinga but only used by these classes -- now they live in the
mysql_wmf module instead.

Change-Id: I31b8d8562f8eda4a6fde4a6110d83a339fc38b94
Merge "Move mysql_wmf into a module." into production