Merge branch 'disable-repid-class-cache' into 'ibm-trunk'

Disable TypeDescriptorCache lookup for ClassDesc to Class resolution

Doing this requires creating a standard utility for converting from repid to class names / classes in yoko-util, which can then be used by code in both yoko-core and yoko-rmi-impl (thus eliminating duplication and inconsistency).

See merge request !50