6951: import/export test suite runner broken

Revived the runner broken as of 3.0.0.
Notable changes:
1) instead of GRDB, using a named 'example' DB
in a dedicated GRAMPSHOME location
2) changed the format list to the more modern one
3) produced GRAMPS XML created manually from .gramps with gunzip
4) action "summary" no longer there, using the textual "summary" report

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps34@22744 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6951: import/export test suite runner broken

Now properly importing all the formats supported.
For better review of the results, diff the summary reports
to the baseline produced from the example DB import.

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps34@22745 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6954: Output command line messages and progress information to stderr rather than stdout

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps34@22748 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Revert two files committed in error

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps34@22749 4ae1f11a-8b86-4847-b8af-ab372f36d1fd