Jira connector does not support self-hosted jira hosted under sub path

[steve192]

When jira is hosted under https://sub.domain.com/jira, danswer tries to call the jira api with https://sub.domain.com/rest/api instead of https://sub.domain.com/jira/rest/api

05/15/2024 01:07:10 PM      run_indexing.py 356 : [Attempt ID: 78] Running indexing attempt for connector: 'JiraConnector-https://sub.domain/jira/projects/PID', with config: '{'jira_project_url': 'https://sub.domain/jira/projects/PID', 'comment_email_blacklist': []}', and with credentials: '1'
05/15/2024 01:07:10 PM      run_indexing.py  71 : [Attempt ID: 78] Unable to instantiate connector due to JiraError HTTP 404 url: https://sub.domain.com/rest/api/2/serverInfo

This is due to the assumption that the jira base url is just the "netloc"
https://github.com/danswer-ai/danswer/blob/main/backend/danswer/connectors/danswer_jira/connector.py#L32

There should be logic similar to the confluence connector where the path is analysed to determine the base url
https://github.com/danswer-ai/danswer/blob/main/backend/danswer/connectors/confluence/connector.py#L68

This could be done using "projects" as an indicator for the start of the actual jira url (e.g. in https://sub.domain/jira/projects/PID/xxxx)

PROJECT = "/project/"
jira_base = (
  parsed_url.scheme
  + "://"
  + parsed_url.netloc
  + parsed_url.path.split(PROJECT)[0]
)