[TBD-1289] tCassandraOutput wrong path to jackson libs

linked to 1.9.7 from tNeo4j to remove the issue
[TBD-1018] In data preview tCassandraInput does not correctly handle variable-length integer columns

Detailed explanation here : https://github.com/hector-client/hector/issues/207
Work-around is to use BigIntegerSerializer when handling int deserialization (works for fixed length and variable length types).
TBD-1018: add support for cassandra 1.1.2.
Merge remote-tracking branch 'origin/maintenance/5.6'