Clean up HTTP authentication code references

[rantoniuk]

Clean up HTTP Auth references from the code based on the discussion in #521 (comment)_

[akshaywakhare]

Hi. I would like to give this a try, can I work on this?

[rantoniuk]

Of course, you're welcome to contribute!

[xRME-18]

Hey, what should be done with all the (deprecated) functions using useHTTPAuth? Should I update the functions with useBearerAuth or remove them entirely? Sorry if its obvious, I'm new to this.

[programbeginnerTW]

Hi, I looked through the mentioned issue above and concluded the disscussion:

1. Bearer Authentication is only allowed on Jira Server but not on Jira cloud.
2. HTTP auth as well as Bearer auth should both exist to meet the requirements of 1.

Hence, I removed the invisibleEntry section of HTTP in the config.jelly file and updated the constructors in file JiraSite.java, as well as the JiraSiteTest.java by adding useBearerAuth.
If I'm misunderstanding the issue, please offer more instructions on how I can contribute to this issue, thanks!

Here is my Pull Request: #562

[abhishekshah5486]

I would like to work on this issue.
Please assign this issue to me.