Refactored tests so that all the unit tests created for wookie-redis are in wookie-spi and can be reused by all SPI implementations

git-svn-id: https://svn.apache.org/repos/asf/wookie/trunk@1568324 13f79535-47bb-0310-9956-ffa450edef68
Make the default SPI implementations reuse the common test cases

git-svn-id: https://svn.apache.org/repos/asf/wookie/trunk@1568325 13f79535-47bb-0310-9956-ffa450edef68