Med: rgmanager/fs: typo preventing passing some mount opts

...which seems to be the original intention;
specifically: ext{3,4} + noload/data=...

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
Merge pull request #427 from jnpkrn/rgmanager-fs-mount-opts

Med: rgmanager/fs: typo preventing passing some mount opts