HPCC-10617 Add support for Cassandra

Added support for SET parameters and dataset fields

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
I ran the test query and seeing mismatches, e.g. in Result1:
```
    - <Row><name>name2</name><value>2</value><boolval>false</boolval><r8>5.6</r8><r4>7.800000190734863</r4><d>3030</d><ddd>-1234567.89</ddd><u1>là</u1><u2>là</u2><set1/><list1/><map1/></Row>
    + <Row><name>name2</name><value>2</value><boolval>false</boolval><r8>5.6</r8><r4>7.800000190734863</r4><d>3030</d><ddd>-1234567.89</ddd><u1>là</u1><u2>là</u2><set1></set1><list1></list1><map1></map1></Row>
```