Remove unnecessary separators from cvp sanity TESTS_SETTINGS

Remove single quotes and spaces from TESTS_SETTINGS because
cvp-sanity expects environment variables with comma-separated
lists here.

Change-Id: If0bc8c19cd5233b63bc12eb09fc4f64da52019c9
diff --git a/tcp_tests/tests/system/test_cvp_pipelines.py b/tcp_tests/tests/system/test_cvp_pipelines.py
index d14d612..2326359 100644
--- a/tcp_tests/tests/system/test_cvp_pipelines.py
+++ b/tcp_tests/tests/system/test_cvp_pipelines.py
@@ -132,12 +132,12 @@
         job_name = 'cvp-sanity'
         job_parameters = {
             'TESTS_SETTINGS': (
-                "skipped_packages='python-setuptools,"
+                "skipped_packages=python-setuptools,"
                 "python-pkg-resources,xunitmerge,python-gnocchiclient,"
-                "python-ujson,python-octaviaclient'; "
-                "skipped_modules='xunitmerge,setuptools'; "
-                "skipped_services='docker,"
-                "containerd'; drivetrain_version={0};{1}"
+                "python-ujson,python-octaviaclient;"
+                "skipped_modules=xunitmerge,setuptools;"
+                "skipped_services=docker,"
+                "containerd;drivetrain_version={0};{1}"
                 .format(settings.MCP_VERSION, ntp_skipped_nodes)),
         }