ServerTypeDesc tree was not cloned correctly

revert merge error from commit https://github.com/xap/xap/commit/c3e1a317da98bbfe733dbaafde4f1f5f52132e20
on ServerTypeDesc.java while refactoring we accidently change the copy constructor which resulted in recreating instances , this resulted in corruption of the _codesRepo map (created to many instances which caused code generator to reach MAX_SHORT)