Save the configuration after releasing an exclusive lock
Save the configuration after releasing an exclusive lock

In most cases, this is what has been already implemented manually.
In some cases, the configuration write is issued even if the
configuration hasn't been modified, but since WConfd checks for such
cases, neither file write nor distribution to nodes is performed.

Signed-off-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

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