Task: Create a deployment pipeline using Travis

[HandOfGod94]

Purpose

Currently travis builds are uniform irrespective of it's PR, a single branch commit, master commit or release. The vision is to have separate builds for pr, for branch and release

Tasks

• [x] modify travis config for branch commits
  • should run tests and checkstyle
• [x] modify travis config for PR
  • it should only run tests and checkstyle
  • check coverage and fail if below certain (Set to 80%)
• [x] modify travis config for release
  • [x] should run tests and checkstyle
  • [x] check coverage and fail if below certain threshold (~use codeacy~, used coveralls)
  • [x] a separate travis stage to push it to sonatype repo

~Need to use travis stages feature to separate out staged builds.~ DONE Coverage Threshold is now at 80% and decrease %age threshold is at 5%