collect salt-ca and set trust [WIP]

Change-Id: I26aeae62cc1c1d407d36d1d6bf101db073d9e610

Update .travis.yml and notififcations

added readme for salt minion http proxy

It was failing with:
	Rendering SLS 'base:salt.minion.cert' failed: Conflicting ID 'salt_ca_certificates_packages'

ca-certificates installation should be probably moved out of the loop in
the future.

Change-Id: I26aeae62cc1c1d407d36d1d6bf101db073d9e601

Change-Id: I89cec95e87db52fd59a84d57c485d8c938711ef3

Unfortunately this is not idempotent, however we surely want to sync
everything when salt.minion state is executed.

Change-Id: I0faaf606b57dbd7d009156abfe50d2e5f350190e

Factorize minion grains generation

This policy will be used for certificate with various keyUsage
parameters. Etcd for example.

Change-Id: I2a6387f8b7ee58fb6f256881e3e09142f13119a9

Change-Id: I1eaa9cf7a7f861cc5de604e03fba8a74436d99ad

add minion.conf default output/log level settings

added autostart for vm into virt

By default the check is OK for a number of processes between 1 and 15
but on our machine the number is up to 48. So we set the limit
accordingly.

Change-Id: Iac3d2b91312dfe778ebcd39b5eb985348c7aee5a

Added Kitchen and Travis

Previous approach fails when all of formulas are installed from git.

Change-Id: I0622461ee6469c59c1fd3ad4a23cdaeaeee1b444

Speed up installation of formula packages

Install all pkgs for formulas together.

This error occures when multiple certs signed by same CA are requested
on minion.

Change-Id: I6b20ab4e1795298c94f55fdc61af99f933d8491c

send mine always (not only on change)

First run is made during salt-master cloud-init and thus it is onchanges
is not suitable here because ca.crt file is already generated.

added config for proxy on salt minion

Syndic service updates

Conditional orders

Refactored salt-syndic features

Fix salt.api state to catch undefined data

added seedng

Support letsencrypt certs for API.

Letsencrypt could makes symlinks to standard locations in the future.

Fix typo in package name

added log_level to salt minion

psutil package