Test Cases should not need to connect to KMC

[flipmcf]

tests/test_kutils.py requires a connection to the KMC.

Create a dummy client that does what the KMC "should" do during a call to client.media.list()
(see kutils.getTagVids, which does the call to the KMC)

The failure that is occuring at the current revision:
65092d8

Is due to a sync issue of tags during creation of the Plone Object - which should be a separate test.

[flipmcf]

See the use of _Monkey in test_content - this is working.

Able to override kconnect() to return a dummy client, which can be leveraged for testing.