azure-run-tests: handle single unexpanded parameter too

If TESTS_TO_RUN contains a single parameter that cannot be expanded,
bash will not perform brace elimination. Remove braces manually.

For example, TESTS_TO_RUN='test_xmlrpc/test_*.py' will not expand
outside of ipatests and the script would generate

 tests_to_run=-k{test_xmlrpc/test_*.py}

Braces then will prevent actual ipa-run-tests execution from matching
any of XMLRPC tests.

Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

ipatests/azure/azure-pipelines.yml

@@ -138,7 +138,8 @@ jobs:
         XMLRPC_tests:
           TEST_TITLE: 'XMLRPC'
           TASK_TO_RUN: run-tests
-          TESTS_TO_RUN: "test_xmlrpc/test_*.py"
+          TESTS_TO_RUN: "test_xmlrpc"
+
   steps:
     - template: templates/setup-test-environment.yml
       parameters:

ipatests/azure/azure-run-tests.sh

@@ -4,7 +4,8 @@ server_domain=example.test
 server_password=Secret123
 
 # Expand list of tests into -k...  -k... -k... .. sequence
-tests_to_run=$(eval "eval echo -k{$(echo $TESTS_TO_RUN | sed -e 's/[ \t]+*/,/g')}")
+# If remaining string still has { or } characters that shell did not expand, remove them
+tests_to_run=$(eval "eval echo -k{$(echo $TESTS_TO_RUN | sed -e 's/[ \t]+*/,/g')}" | tr -d '{}')
 
 systemctl --now enable firewalld
 ipa-server-install -U --domain ${server_domain} --realm ${server_realm} -p ${server_password} -a ${server_password} --setup-dns --setup-kra --auto-forwarders