Fix Oracle SSL tests

Define new test for Oracle SSL connectivity, in oracle_test.clj, similar to how things work in mysql_test.clj

Add new test util macro, with-env-keys-renamed-by, to support running tests with environ keys temporarily renamed

Using new test macro from both MySQL and Oracle SSL connectivity tests

Removing now unneeded be-tests-oracle-ssl-ee CircleCI job

Removing now unneeded test-selector parameter for test-driver orb in CircleCI config.yml

Updating JVM_OPTS to use a trust store that starts with cacerts and adds the RDS root CA, rather than one only
containing the RDS root CA