Readd nodes as online
Readd nodes as online

Patch d0d7d7cf accidentally removed the offline-flag reset
when readding a node. Readd it.

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

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