vendor: fix mixed versions of gophercloud packages

* Add openstack service discovery.

* Add gophercloud code for openstack service discovery.

* first changes for juliusv comments.

* add gophercloud code for floatingip.

* Add tests to openstack sd.

* Add testify suite vendor files.

* add copyright and make changes for code climate.

* Fixed typos in provider openstack.

* Renamed tenant to project in openstack sd.

* Change type of password to Secret in openstack sd.

Add logger injection into discovery services

Fix outdated target_group naming in error message

The target_groups config has been renamed to static_configs, the error
message for overflow attributes should reflect that.

It is likely this will fix #2758.

Fixes #345

Apparently, a decision was made at some point to only use the v prefix
in tags and similar contexts where other things can appear. There was a
vote to stick to that decision. For more information, read
https://github.com/prometheus/prometheus/pull/2743.

This reverts commit 5405a472.

prefix redirect with external url path

cut 1.6.3

Fixed graph ui max/min logic to accommodate for toggling of stacked graph option

notifier: clone and not reuse LabelSet in AM discovery

* Fix malformed uname string

* Make fix better

* Reformat code for simplicity

* vendor: upgrade govalidator to v6

* Upgrade govalidator to latest in master.

* Run govalidator update through govendor

* Print uname on prom startup

* Make uname file linux-only

* Add missing license headers

Add missing license headers

* Print OS when uname is not available

* Print only OS name when uname not available

* Remove extra space, fix cmd/prometheus/main.go license header

* Add fix for int8 and uint8 systems

* Better formatting for build tags in cmd/prometheus/uname files

* Remove newline

This allows users to e.g. add links back to the generating Prometheus
right in their alert templates.

vendor: remove leftover dependency

Regression introduced in
https://github.com/prometheus/prometheus/commit/e5d7bbfc3c7e38b4ee257dd1c6bc9b3e28b23d57