Expanded defaults elimination in confTool diff functionality

This MR is improving the diffng in the confTool when used for old vs new configurations. The default value of property that is a handle has form: A in the old config and Type/A in the new system. Wiht the new option --ignoreDefaultNamedComps the tool assumes that if the default is A and the actual value is Type/A then it is in fact the default and eliminates it. This can be very wrong, i.e. one can imagine that another implementation Type2/A is used and thus the diff will not catch it.

Addition of a new option followed the discussion with @jchapman