BUG: Build fails after using correct spring-test-mvc pom &
BUG: BundleIT expecting motech user to be present

added necessary exclusions to spring dependencies of spring-test-mvc so that we
won't have duplicate spring jars in our bundle tests.
Also, since BundleIT expects motech user to present, it is created before
running IT and dropped after IT.

https://trello.com/c/FFCP8xWk
https://trello.com/c/Fm3Hk5uh

Change-Id: I7404fc627521ff8ac453262652c059165c9fd862