Trivial fix to license and dependency

README.rst
  Was not rendering correctly due to license portion.  Just
  moved it down so that rst file would render correctly on github

pom.xml
  maven handles mockito transitive dependencies so we only need
  to depend on mockito-core instead of mockito-all.

Change-Id: I125bd88fec66f843ccc8f1863ed6d1803513405b