More abstractions from DRBD7 to base class
More abstractions from DRBD7 to base class

This moves the _SetFromMinor and _MassageProcData to the base class.

Reviewed-by: imsnah


dimara/ganeti,yiannist/ganeti,leshchevds/ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,leshchevds/ganeti,onponomarev/ganeti,ganeti/ganeti,andir/ganeti,bitemyapp/ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/ganeti,yiannist/ganeti,bitemyapp/ganeti,andir/ganeti,mbakke/ganeti,ganeti/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,ganeti/ganeti,apyrgio/snf-ganeti,andir/ganeti,yiannist/ganeti,apyrgio/ganeti,mbakke/ganeti,dimara/ganeti,grnet/snf-ganeti,mbakke/ganeti