* Replace llvm-gcc with gcc.
* Define new Hadoop services.
* Add retry when first using Hadoop.
* Update procps package to address bug.
* Increase memory from 4GB to 6GB.
* Disable vmem-check in yarn.

(cherry picked from commit e90ed376)

(cherry picked from commit ff65c883)

Cherry pick ebb13031

update firefox version test for jenkins workers

(cherry picked from commit 37dfceb6)

(cherry picked from commit d891e660)

temp add stop-automatic-updates to packer scripts

(cherry-picked from 304d6ead)

We already do this in the common role but not in bootstrap or abbey roles.

(cherry picked from commit b78c0487)

See https://github.com/ansible/ansible/issues/21316

This prevented successful installation of open-release/ficus.1rc

(cherry picked from commit a79fe1b7)

Apply the change to install MySQL 5.6 from an edX PPA

(cherry picked from commit 6218350b)

(cherry picked from commit b8ed4f49)

(cherry picked from commit 6e4a47de)

Cherry pick from c6514cca

Use my-passwords.yml in sandbox.sh

(cherry picked from commit f3970b73af316502722e6153f11af52f7b61112d)
(cherry picked from commit 81cc046ff09e69642eeb7cb82aa1f7b08b28c649)

(cherry picked from commit b2beddb4d35c12537d17454e543363201c578cd8)

Cherry-picked from 5 commits, from PR's #3654 and #3670:

(cherry picked from commit 3df8af7f)

(cherry picked from commit 8cad356a)

(cherry picked from commit 2ef0aa42)

(cherry picked from commit 59b50c82)

(cherry picked from commit 00be986f)

(cherry picked from commit a3975c4e)

This should help decrease build times.

ECOM-6600

Cherry pick from 64facf1b

Cherry picked from e4cacb16

Fix #21

Cherry picked from 31b6ee56028550b9aa9fac840f3f2040fadaeaf2

Pin nodeenv's node version to 6.9.4 LTS for Platform, Ecommerce, Insights and Credentials