Fix readiness & liveness probe configuration detection

[erdrix]

Reworks statefulset's changes detection by the operator, to work with live & ready probe configurations.

[cscetbon]

@erdrix I think it's missing a unit test. See

casskop/pkg/controller/cassandracluster/cassandra_status_test.go

Line 261 in f251372

func TestUpdateStatusIfconfigMapHasChangedWithNoConfigMap(t *testing.T) {

on how to use reconcile if you want to test the update of the new parameters. I let you figure out what is the easiest, unit test or e2e

[erdrix]

I'm ok with you about unit test, I added some test but not using the reconcile, the bug was about the StatefulSetsAreEqual function which didn't detecting update, so I added some unit-tests for this function :)
Tell me if its seems enough for you.

[cscetbon]

@erdrix Just the minor change I talked about to remove the unneeded declaration and we're good.

Good job 👏