Improve quotes in testrail reporter params

* Remove quotes from testrail_configuration_name
* Remove default params
* Remove extra quotes from the report file name

Change-Id: Ia343d091f684913bce6bf41de7b80bf2d2687255
diff --git a/src/com/mirantis/system_qa/SharedPipeline.groovy b/src/com/mirantis/system_qa/SharedPipeline.groovy
index ddb82bb..34049e7 100644
--- a/src/com/mirantis/system_qa/SharedPipeline.groovy
+++ b/src/com/mirantis/system_qa/SharedPipeline.groovy
@@ -701,7 +701,7 @@
   def script = """
     . ${venvPath}/bin/activate
     set -ex
-    report ${reporterOptions.join(' ')} '${report_name}'
+    report ${reporterOptions.join(' ')} ${report_name}
   """
 
   def testrail_cred_id = params.TESTRAIL_CRED ?: 'testrail_system_tests'