murmur_hash relys on HashUtil::MurmurHash2_64 which MurmurHash2 64-bit
version.
Testing:
Add unit tests for primitive types: ExprTest.MurmurHashFunction
Add E2E tests into exprs.test
Change-Id: I14d56ffb8fab256f3f66a2669271fd4b3c50cc29
Reviewed-on: http://gerrit.cloudera.org:8080/8893
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Impala Public Jenkins