Updated Automate UI export to use backup with zip format.

Rewrote MiqAeDatastore unit test for new automate zip format.
Test validates more counts than previous version and skips unneeded "should_not raise_error" export test.
Remove RedHat specific class and implement anonymous_ftp subclass

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Testing .log_status should not blindly call .log_system_status

MiqServer.log_system_status does a lot of shelling out.
Merge pull request #162 from brandondunne/file_depot_blind_ftp

Remove RedHat specific class and implement anonymous_ftp subclass
Merge pull request #163 from chessbyte/fix_miq_server_status_management_spec

Testing .log_status should not blindly call .log_system_status
Merge pull request #156 from gmcculloug/automate_ui_export

Updated Automate UI export to use backup with zip format.
Default priority for domain, set priority based on ordered domain ids
Merge pull request #158 from mkanoor/domain_properties

Default priority for domain, set priority based on ordered domain ids
Simplify OpsController::Diagnostics#log_depot_build_edit_screen

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Fix typo

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Remove unnecessary verify and validate methods for log_depot_settings

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Remove credential validation from creation

FileDepotNfs.create!(:uri => "nfs://test") fails because of missing credentials
https://bugzilla.redhat.com/show_bug.cgi?id=965889
Add #verify_credentials methods to appropriate FileDepot subclasses

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Change FileDepot ::SUPPORTED_DEPOTS to #supported_depots

Build a hash of subclass => display_name for all descendants
https://bugzilla.redhat.com/show_bug.cgi?id=965889
Update drop-down to to get the correct uri_prefix based on the model

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Add support_case and depot_name to the edit screen where appropriate

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Add reverse relationship for MiqServer#log_file_depot

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Create log_file_depot using relationships

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Simplify all the things

https://bugzilla.redhat.com/show_bug.cgi?id=965889
Ensure that all FileDepots are subclassed

https://bugzilla.redhat.com/show_bug.cgi?id=965889