Replaced Class::MOP::load_class by Class::Load::load_class and friends
since Class::MOP is deprecated for those as per
https://metacpan.org/pod/release/ETHER/Moose-2.1201/lib/Moose/Manual/Delta.pod#pod2.1200
See also: https://rt.cpan.org/Public/Bug/Display.html?id=90938