pom.xml:
 - New dependencies - mockito, guava, hamcrest.

BugRepoImpl.java:
 - New class. Implementation of the BugRepository from the SPI.

BugzillaServer.java:
 - New class. Implementation of the Bugzilla class from the SPI.

ProductRepoImpl.java:
 - New class. Implementation of the ProductRepository from the SPI.