https://github.com/ManageIQ/manageiq-providers-vmware/pull/359
On 5.9.9.0 I was able to provision VM on VMware, and in the Datastores list, Inactive datastore was filtered out as expected.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2019:0600