allow for only installing haproxy 1.5

[jonhatalla]

• separated install and configure logic cleanly
• allow for only installing application by setting haproxy_use_config flag to false

As it stands, this PR will only change the folder structure. We manage our own haproxy config with a specialized template, but everything else in your role is great for us.

[PierrePaul]

Good idea. Would you mind if I changed the var to "haproxy_manage_config" [True | False] ?

[jonhatalla]

not at all

[jonhatalla]

just a heads up - this won't start the service if haproxy_manage_config is set to false. This actually should be expected since the default config won't be of much use anyways.

The current tests should still pass as no functionality has changed from their perspective.

[jonhatalla]

i went ahead and updated the variable name

[PierrePaul]

Thank you!