Remove repeated initialisation

Due to the mox object being created twice, anything that was mocked
by the original instance only will never be unset. Remove the repeated
self.mox creation to allow new tests to run properly.

Change-Id: Icf644178f5a8270f913997e7e3f10dade412b321
Add command for listing available service providers

implements blueprint service-types-cli

Add command service-provider-list - lists service providers available
in neutron configuration

Change-Id: I2ea25abc6d54b93fd9d11e8c494d7e3f77f25c53
Merge "Add command for listing available service providers"