python3-jinja2: Fix ptest RDEPENDS and file installation

jinja2's ptest is failing when running meta-python-ptest-image. This is
happening for two reasons:

1) python3-jinja2 is in oe-core, but the ptests are disabled.
2) python3-toml is required for the ptest;

Because of #1, do_install_ptest doesn't actually run and so no tests are
installed for ptest-runner to use. This patch adds do_install_ptest to the
bbappend file for jinja2, and also adds python3-toml to the ptest RDEPENDS so
that it will install the tests and run correctly.

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

meta-python/recipes-devtools/python/python3-jinja2_2.%.bbappend

@@ -1,2 +1,13 @@
 # Main recipe was moved to oe-core, but with ptest disabled
 inherit ${@bb.utils.filter('DISTRO_FEATURES', 'ptest', d)}
+
+do_install_ptest() {
+    install -d ${D}${PTEST_PATH}/tests
+    cp -rf ${S}/tests/* ${D}${PTEST_PATH}/tests/
+}
+
+RDEPENDS_${PN}-ptest += " \
+    ${PYTHON_PN}-pytest \
+    ${PYTHON_PN}-toml \
+    ${PYTHON_PN}-unixadmin \
+"