Add Bucket Type properties ops and itests

testResetBucketTypeProps() fails because ... Riak 2.0.0pre3 is broke.

Bucket type tests are optional. Create a bucket type named 'test_type' and then use:
`mvn clean install -Pitest,test-debug-logging -Dcom.basho.riak.buckettype=true`

Closes #312 
Closes #296