python3-blinker: switch to pytest --automake

* Also replace ${PYTHON_PN} with python3

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-inflection_0.5.1.bb

@@ -13,8 +13,8 @@ SRC_URI +=" \
 	file://run-ptest \
 "
 
-RDEPENDS:${PN}_ptest +=" \
-    python3_pytest \
+RDEPENDS:${PN}-ptest +=" \
+    python3-pytest \
     python3-unittest-automake-output \
 "