Disable strong_usernames for test-cookiecutter-templates job

Disable strong_usernames parameter for test-cookiecutter-templates
to reduce diff between head and patched model.

Change-Id: I34ff9ee31f48092deb707bd8d64128edef74ec5c
Related-Prod: PROD-00000
diff --git a/test-cookiecutter-reclass.groovy b/test-cookiecutter-reclass.groovy
index b7004f6..9c34f58 100644
--- a/test-cookiecutter-reclass.groovy
+++ b/test-cookiecutter-reclass.groovy
@@ -146,6 +146,10 @@
                 contextYaml['default_context']['secrets_encryption_enabled'] = 'False'
             }
 
+            // disabling strong_usernames for tests to reduce diff between head and patched model
+            common.warningMsg('Disabling strong_usernames for tests!')
+            contextYaml['default_context']['strong_usernames'] = 'False'
+
             def context = mcpCommon.dumpYAML(contextYaml)
             if (!fileExists(new File(_templateEnvDir, 'tox.ini').toString())) {
                 common.warningMsg('Forming NEW reclass-root structure...')