closes #1898

* plugins/input/consul: moved check_id from regular fields to tags.

When service has more than one check sending data for both would overwrite each other
resulting only in one check being written (the last one). Adding check_id as a tag
ensures we will get info for all unique checks per service.

* plugins/inputs/consul: updated tests

closes #1763
closes #2017

* Update MySQL Readme to clarify connection string examples.

* Update mysql sample config to clarify connection string examples

closes #2006

* fixed parsing of docker image name/version

now accounts for custom docker repo's which contain a colon for a non-default port

* 1978: modifying docker test case to have a custom repo with non-standard port

* using a temp var to store index, ran gofmt

* fixes #1987, renaming iterator to 'i'

* MongoDB input plugin: Improve state data

Adds ARB as a "member_status" (replica set arbiter).
Uses MongoDB replica set state string for "state" value.

* MongoDB input plugin: Improve state data - changelog update

put Makefile back to normal

removed comment from puppetagent.go

changed config_version to config_version_string and fixed yaml for build

changed workind from branch to environment for config_string

fixed casing and Changelog

fixed test case

closes #1917

closes #1993
closes #1693

closes #2079
closes #1910

closes #1893

Added unit tests for the changes

Fixes #1904

closes #2045

closes #2103

closes #2068

closes #2061

* Rabbitmq plugin: connection-related metrics.

* Run go fmt.

* Fix bug: too many cloudwatch metrics

Cloudwatch metrics were being added incorrectly. The most obvious
symptom of this was that too many metrics were being added. A simple
check against the name of the metric proved to be a sufficient fix. In
order to test the fix, a metric selection function was factored out.

* Go fmt cloudwatch

* Cloudwatch isSelected checks metric name

* Move cloudwatch line in changelog to 1.2 features

closes #1843
fixes  #1668

fixes #2146

Prevents the same data from being looked up multiple times. Also prevents multiple simultaneous lookups.

closes #2115
closes #2104