python3-u-msgpack-python: 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-u-msgpack-python_2.8.0.bb

@@ -12,7 +12,8 @@ SRC_URI += " \
 "
 
 RDEPENDS:${PN}-ptest += " \
-       ${PYTHON_PN}-pytest \
+    python3-pytest \
+    python3-unittest-automake-output \
 "
 
 do_install_ptest() {
@@ -20,7 +21,7 @@ do_install_ptest() {
 }
 
 RDEPENDS:${PN} += " \
-    ${PYTHON_PN}-datetime \
+    python3-datetime \
 "
 
 BBCLASSEXTEND = "native nativesdk"