Bug #1198286 provider router demo is confusing

Change router ownership to the provider tenant.
Use more descriptive names for the tenants.
Clarify which users/tenants are doing what.
Note that the router can connect more networks from other tenants.
Simplify net-create by removing provider attribute parameters.
Made editorial changes - diane fleming

Change-Id: I89cc707ac815ed06e3dc648208fe4fb2008a802d
Merge "Bug #1198286 provider router demo is confusing"