[CELEBORN-918][INFRA] Auto Assign First-time contributor with Contributors role
### What changes were proposed in this pull request?
As an incubating project, first-time contributors‘ welcome is routine. This PR adds automation for granting Contributors role to them to make them a assignable for issues
### Why are the changes needed?
GitHub - JIRA integration
### Does this PR introduce _any_ user-facing change?
no
### How was this patch tested?
tested at apache/spark project, and
```python
>>> asf_jira.project_roles("CELEBORN")
{'Developers': {'id': '10050', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10050'}, 'Contributors': {'id': '10010', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10010'}, 'PMC': {'id': '10011', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10011'}, 'Committers': {'id': '10001', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10001'}, 'Administrators': {'id': '10002', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10002'}, 'ASF Members': {'id': '10150', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10150'}, 'Users': {'id': '10040', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10040'}, 'Contributors 1': {'id': '10350', 'url': 'https://issues.apache.org/jira/rest/api/2/project/12324920/role/10350'}}
```
Closes #1839 from yaooqinn/CELEBORN-918.
Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: zky.zhoukeyong <zky.zhoukeyong@alibaba-inc.com>
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