Merge pull request #101 from rightscale/salmon_13_15_acu131306_thrift_client_options

Disable Thrift client's builtin server retry delay; it clashes with our own client-side request balancer.
acu126108 - First commit for optimizing
acu125108 - Removed uneccsiary parameters from Cassandra call.
acu126108 - Fixed result set usage for CassandraModel.
Version bump to 2.7.1
Merge branch 'release4.10'