Added option to support stf repo and branch

[SehrishHussain]

Changed the corresponding files by adding environment variables is env.STF_REPO and env.STF_BRANCH.
Addressing issue: #109

[sophia-guo]

@SehrishHussain sorry, I may forget to mention that SFT repo is related with system tests, not openjdk tests. So please move this block to system tests check.

run-aqa/src/runaqa.ts

Line 63 in 7ffa6dc

if (buildList.includes('system')) {

[SehrishHussain]

@sophia-guo does this line go like this:
if (buildList === 'aqa-systemtestRepo' && stfRepo && stfRepo.Length!==0)

[sophia-guo]

you can simply add your change after

run-aqa/src/runaqa.ts

Line 66 in 7ffa6dc

}

.

if (stfRepo && stfRepo.length !== 0) {
 const repoBranch = parseRepoBranch(stfRepo)
    process.env.STF_REPO = repoBranch[0]
    process.env.STF_BRANCH = repoBranch[1]
  }

[SehrishHussain]

@sophia-guo please check the changes.

[sophia-guo]

LGTM

[SehrishHussain]

@smlambert can you review and approve please. TIA

[smlambert]

This supersedes #111 - so we will ask @akanbifatimah to close her PR for the same issue.

[smlambert]

This was approved but never merged (and now the branch contains conflicts that need to be resolved).

@SehrishHussain - is it possible for you to resolve the conflicts?

if resolved then @sophia-guo can you re-review and merge? if not resolved in the next couple of weeks, let's close it as stale

[karianna]

@SehrishHussain & @sophia-guo - bump :-)