Correct the entry points of cucumber-testresult

The entry point cucumber_testresult is incorrect given the style
adopted for all the other entry points, it should be:

cucumber-testresult=jenkins_jobs.modules.publishers:cucumber_testresult

Change-Id: I60fcecb667cb5aa626e9ca7b9dcaa3dba3122cfa

jenkins_jobs/modules/publishers.py

@@ -978,7 +978,7 @@ def junit(parser, xml_parent, data):
 
 
 def cucumber_testresult(parser, xml_parent, data):
-    """yaml: cucumber
+    """yaml: cucumber-testresult
     Publish cucumber test results.
     Requires the Jenkins :jenkins-wiki:`cucumber testresult
     <Cucumber+Test+Result+Plugin>`.