improvements to confTool.py --structured

New confTool.py options:

  --classes             Only show class names
  --uniqueClasses       Only show unique classes
  --includeClasses INCLUDECLASSES
                        Only list the components selected by the given classname (anchored regular expression)
  --excludeClasses EXCLUDECLASSES
                        Don't list the components excluded by the given classname (anchored regular expression)
  --excludeComponents EXCLUDECOMPONENTS
                        Don't list these components (anchored regular expression)
  --includeClassesSub INCLUDECLASSESSUB
                        Below the top-level, also include the components selected by the given classname (anchored regular expression)
  --includeSequences    Include sequences in the structured printout
  --showComponentName   Show component name with --classes
  --maxDepth MAXDEPTH   Maximum depth for structured printout
  -q, --quiet           Don't print command arguments

So the command:

confTool.py -q -s ApplicationMgr --uniqueClasses --includeSequences --skipProperties --ignoreIrrelevant file.pkl

produces a compact hierarchical list of all the classes in the ApplicationMgr sequences with duplicate hierarchies suppressed.

This MR also adds in protection against recursive expansion of components. This can happen if a property value has the same name as a component name.