suites: gprs: Introduce suite with ping test

Only GPRS signalling setup is supported so far by osmo-gsm-tester, thus
we don't test sending data yet here, but at least we can already test
pdp context activation.

This test will be extended to run ping once we support setting up the
GPRS data plane in osmo-gsm-tester.

Change-Id: I8695029cb7a43cd48f650c88f38b4c054da0bc6b
diff --git a/example/resources.conf b/example/resources.conf
index d503a48..26e1d80 100644
--- a/example/resources.conf
+++ b/example/resources.conf
@@ -7,6 +7,8 @@
 - addr: 10.42.42.5
 - addr: 10.42.42.6
 - addr: 10.42.42.7
+- addr: 10.42.42.8
+- addr: 10.42.42.9
 
 bts:
 - label: sysmoBTS 1002