In IP-XACT, the reset value is not mandatory.  Added a reg5 as reg4 but without resetValue
.../ipxact2systemverilog/bin/ipxact2hdlCommon.py:722: FutureWarning: The behavior of this method will change in future versions.  Use specific 'len(elem)' or 'elem is not None' test instead.
merged and changed testcase not to fail on SystemVerilog code. #2