Update rubies; Remove BUNDLE_JOBS as it's not respected by Travis

[abotalov]

No description provided.

[twalpole]

Is not respecting BUNDLE_JOBS a new change on Travis?? I'm pretty sure it used to respect it

[abotalov]

See:
calagator/calagator@87169d0
teampoltergeist/poltergeist#499 (comment)

After some search in travis-build/travis-build I found that first commit that added --jobs=3 is probably this one - travis-ci/travis-build@6cb7c4d and current implementation seems to be here (https://github.com/travis-ci/travis-build/blob/a9f5fe32fffb4d4ceee2062770c7c50aa3098d3a/lib/travis/build/script/shared/bundler.rb). Though I don't know Travis structure, I've just searched through it.

So travis-build sets --jobs=3 without checking for BUNDLE_JOBS env variable. Probably this is a bug in Travis but I think --jobs=3 is fine for us.

cc @joshk

[twalpole]

ok 3 vs 4 wouldn't make much difference anyway -- merging -- thanks