Fix for existence of Storage Manager Type value during validation

A blank value for StorageManager Type was not being checked while
validating the credentials.

https://bugzilla.redhat.com/show_bug.cgi?id=1123962
Add event network update vm interface for rhev/ovirt post functions
Merge pull request #373 from jcarter12/event_network_update_vminterface

Add event network update vm interface for rhev/ovirt post provision functions
Fixed typo in admin role features list

https://bugzilla.redhat.com/show_bug.cgi?id=1129284
Merge pull request #376 from dclarizio/add_route_for_sorting_pxe_grid

Add route for pxe grid sorting
Merge pull request #371 from AparnaKarve/bz1123962_storage_mgr_validate_creds_issue

Fix for existence of Storage Manager Type value during validation
setup password for internal database config

- both internal and external prompt for user credentials
- move database config into common area
- don’t show (none for non default) if no default password
- use md5 for all network connections (no ident installed)
- allow cli to pass in username/password
- configure CentOS appliance with default password

https://bugzilla.redhat.com/show_bug.cgi?id=1128291