Bugfix: All HA testcases are SSH timeout in CI jobs

Bugfix: All HA testcases are SSH timeout in CI jobs

JIRA: DOVETAIL-405

1. All HA test cases running in CI are SSH timeout.
2. The reason is that HA test cases need a file pod.yaml providing the info of
   each node of Openstack.
3. This pod.yaml should be put in $DOVETAIL_HOME/dovetail/userconfig by users.
4. Dovetail's CI jobs should also do some adaptions. JIRA: DOVETAIL-407
5. modify file .gitignore to ignore directories results/ and userconfig/.

Change-Id: I5c681445ec83c9d67a0151370f5b56840ffe444c
Signed-off-by: xudan <xudan16@huawei.com>