python3-pyserial: update recipe to use the ptest-python-pytest class

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-pyserial/run-ptest

@@ -1,4 +0,0 @@
-#!/bin/sh
-
-
-pytest --automake

meta-python/recipes-devtools/python/python3-pyserial_3.5.bb

@@ -4,7 +4,9 @@ LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=520e45e59fc2cf94aa53850f46b86436"
 
 SRC_URI[sha256sum] = "3c77e014170dfffbd816e6ffc205e9842efb10be9f58ec16d3e8675b4925cddb"
 
-inherit pypi setuptools3 ptest
+inherit pypi setuptools3 ptest-python-pytest
+
+PTEST_PYTEST_DIR = "test"
 
 do_install:append() {
     rm -f ${D}${bindir}/pyserial-miniterm
@@ -49,16 +51,3 @@ RDEPENDS:${PN} = "\
 
 BBCLASSEXTEND = "native nativesdk"
 
-SRC_URI += " \
-	file://run-ptest \
-"
-
-RDEPENDS:${PN}-ptest += " \
-    python3-pytest \
-    python3-unittest-automake-output \
-"
-
-do_install_ptest() {
-	install -d ${D}${PTEST_PATH}/test
-	cp -rf ${S}/test/* ${D}${PTEST_PATH}/test/
-}