python3-pyzmq: added ptest

And update the summary and description from the github website.

Two tests are failing because cython is not installed.
But this is the same when running pytest under a native Linux system.

Signed-off-by: Jan Vermaete <jan.vermaete@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-core/packagegroups/packagegroup-meta-python.bb

@@ -515,6 +515,7 @@ RDEPENDS:packagegroup-meta-python3-ptest = "\
     python3-pyserial-ptest \
     python3-pytest-lazy-fixture-ptest \
     python3-pytoml-ptest \
+    python3-pyzmq-ptest \
     python3-requests-file-ptest \
     python3-requests-toolbelt-ptest \
     python3-scrypt-ptest \