Disable SSL tests for old Python

- Appveyor error: ` AttributeError: module 'ssl' has no attribute 'PROTOCOL_TLS_CLIENT'`

Author: CJCombrink

test/py/RunClientServer.py

@@ -212,6 +212,9 @@ def run(self, conf, test_count):
         # skip any servers that don't work with SSL
         if with_ssl and try_server in SKIP_SSL:
             return False
+        if with_ssl and (sys.version_info < (3,7)):
+            print('Skipping \'with_ssl\' test since python 3.7 or later is required')
+            return False
         if self.verbose > 0:
             print('\nTest run #%d:  (includes %s) Server=%s,  Proto=%s,  zlib=%s,  SSL=%s'
                   % (test_count, genpydir, try_server, try_proto, with_zlib, with_ssl))
@@ -243,6 +246,9 @@ def run_all_tests(self):
                             # skip any servers that don't work with SSL
                             if with_ssl and try_server in SKIP_SSL:
                                 continue
+                            if with_ssl and (sys.version_info < (3,7)):
+                                print('Skipping \'with_ssl\' test since python 3.7 or later is required')
+                                continue
                             test_count += 1
                             if self.verbose > 0:
                                 print('\nTest run #%d:  (includes %s) Server=%s,  Proto=%s,  zlib=%s,  SSL=%s'