MINIFICPP-1679 revert Relationship operator!= Because on GCC < 10, consistent comparison is not supported yet. :(
MINIFICPP-1679 revert Relationship operator!=
Because on GCC < 10, consistent comparison is not supported yet. :(

This closes #1209
Signed-off-by: Martin Zink <0893131a0628c2cd73a113e404478489be1b9b3f@apache.org>

dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp