haproxy 1.5.9

Closes #35076.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
haproxy: update 1.5.9 bottle.
elasticsearch 1.4.2

Closes #35077.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Mark maven as a build-time dep where appropriate
Start versioning cached git clones
Merge remote-tracking branch 'upstream/master'