python3-gunicorn: tweak run-ptest, add RDEPENDS

gunicorn relies on eventlet and gevent for its ptests, and it also
requires a non-empty /etc/resolv.conf for one of those tests. Add those
two modules to RDEPENDS for the recipe, and add an echo in run-ptest to
make sure that there is something basic in /etc/resolv.conf before the
test actually runs.

Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>

meta-python/recipes-devtools/python/python3-gunicorn_20.1.0.bb

@@ -12,6 +12,8 @@ SRC_URI += " \
 "
 
 RDEPENDS:${PN}-ptest += " \
+    ${PYTHON_PN}-eventlet \
+    ${PYTHON_PN}-gevent \
 	${PYTHON_PN}-pytest \
 "