VMware: datastore regex not honoured

Commit 9408d79e7413aadcba52a61b7a33164090785e4f did not pass the
datastore regular expression to the VMOps class. This resulted in the
configured parameter being ignored.

Fixes bug: 1222349

Change-Id: I0c7619b281662121f353c04e07331404d747b28b
Merge "VMware: datastore regex not honoured"