Correct comments
Correct comments

Correct comments which confuse the target node with the secondary node
of an instance in LUInstanceMove.

Signed-off-by: Thomas Thrainer <98bdeac947eb8ca18146e9ce7f092788ec242cd1@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

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