examples.testplans: Adjust to py2/py3 rpm packages

The `python-avocado` package does not exists anymore, now we have py2
and py3 version. Let's check both and include the `src.rpm` as well.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

examples/testplans/release.json

@@ -13,7 +13,7 @@
 	 "description": "On your development machine, build the Avocado RPM packages using: `$ make rpm`. Expected result: SRPM and RPM files at `BUILD/RPM/python-avocado-x.y.z-r.distro.{src,noarch}.rpm`"},
 
 	{"name": "Avocado RPM lint",
-	 "description": "With the built RPMs, check if there are no packaging errors or warnings by running: `$ rpmlint BUILD/RPM/python-avocado-x.y.z-r.distro.noarch.rpm`.  Expected result: 1 packages and 0 specfiles checked; 0 errors, 0 warnings."},
+	 "description": "With the built RPMs, check if there are no unexpected packaging errors or warnings by running: `$ rpmlint BUILD/RPM/python*-avocado-x.y*.rpm`.  Expected result: 3 packages and 0 specfiles checked; 0 errors, 0 warnings. (some missing man-pages can be ignored)"},
 
 	{"name": "Avocado RPM install",
 	 "description": "On a fresh virtual machine, perform the installation of Avocado using the packages built on test 'Avocado RPM build' and the aexpect package from src or avocado repo. Also install and start the qemu-guest-agent."},