New service management

1. Integrate GeoDR Cmdlets to public repository of Windows Azure PowerShell.
2. Fix break of unit tests under Commands.SqlDatabase.Test due to incorrect paths of the following two files:
MockSessions.xml
Microsoft.WindowsAzure.Commands.SqlDatabase.Test.psd1

Unit tests passed.
Basic end-to-end GeoDR tests using BB oneboxes passed.
Canonical GeoDR tests pending.  PLEASE DON'T MERGE THIS PULL REQUEST UNTIL WE ARE DONE WITH THE CANONICAL TESTS.