Update to masked credential format

* To support change in Pro export format. Previous format looked
like an XML element, for no reason, failed validation.
Merge remote-tracking branch 'metasploit-framework/master' into masked-cred-format-update
Merge remote-tracking branch 'metasploit-framework/master' into masked-cred-format-update
Merge remote-tracking branch 'metasploit-framework/master' into masked-cred-format-update
Removing old report API example

* This should be in Pro code since reporting over the API is Pro
only. Also this version is now mad out of date.
Gemfile update for new MDM version

* Updated MDM is live
Merge remote-tracking branch 'metasploit-framework/master' into masked-cred-format-update
Land #2810, masked password format switcheroo