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

closes #1348

* return partition stat alongside disk stat from disk usage method, and report device name (minus /dev/) as a tag in disk stats

* update system/disk tests to include new partition stat return value from disk usage method calls

* update changelog for #1807 (use device name instead of path to report disk stats)

Signed-off-by: Pierre Fersing <pierre.fersing@bleemeo.com>

On linux, the cpu timer counters of user and nice include the respective guest and guest_nice counters. This results in improper calculation of percentages.

Please see:
https://github.com/torvalds/linux/blob/447976e/kernel/sched/cputime.c#L169
https://lists.linuxfoundation.org/pipermail/virtualization/2009-August/013459.html
https://github.com/giampaolo/psutil/pull/940

main reasons behind this:
- make adding/removing tags cheap
- make adding/removing fields cheap
- make parsing cheaper
- make parse -> decorate -> write out bytes metric flow much faster

Refactor serializer to use byte buffer