osmo-mgw's configure.ac won't find osmotestvty.py, unless it is
executable. This allows passing its ./configure with placing the scripts
dir of osmo-python-tests in PATH, instead of installing it.
Change-Id: If6cefd32d0dc544093db08efc114db86b9bb18b0
This simple tool dump all the rate counters available via ctrl interface
to cvs file (or stdout).
Change-Id: I12b369434e4ee9b38f92872f297e1f3d4f0698c2
Fixes: OS#2550