Documentation updates for mcpu.py
Documentation updates for mcpu.py

This is the only change needed to make mcpu epydoc-compliant.

Reviewed-by: ultrotter

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