Fix install jira-python

jira-pytyhon package should be installed by

  sudo pip install jira

cc pwendell

Author: Davies Liu <davies@databricks.com>

Closes apache#6367 from davies/fix_jira_python2 and squashes the following commits:

fbb3c8e [Davies Liu] Fix install jira-python

dev/create-release/releaseutils.py

@@ -27,7 +27,7 @@
     from jira.exceptions import JIRAError
 except ImportError:
     print "This tool requires the jira-python library"
-    print "Install using 'sudo pip install jira-python'"
+    print "Install using 'sudo pip install jira'"
     sys.exit(-1)
 
 try:

dev/github_jira_sync.py

@@ -28,7 +28,7 @@
     import jira.client
 except ImportError:
     print "This tool requires the jira-python library"
-    print "Install using 'sudo pip install jira-python'"
+    print "Install using 'sudo pip install jira'"
     sys.exit(-1)
 
 # User facing configs

dev/merge_spark_pr.py

@@ -426,7 +426,7 @@ def main():
             print "JIRA_USERNAME and JIRA_PASSWORD not set"
             print "Exiting without trying to close the associated JIRA."
     else:
-        print "Could not find jira-python library. Run 'sudo pip install jira-python' to install."
+        print "Could not find jira-python library. Run 'sudo pip install jira' to install."
         print "Exiting without trying to close the associated JIRA."
 
 if __name__ == "__main__":