Refreshing osm_metrics stack

Moves Prometheus installation to OSM Core for it to be available for MON Collector.
Sets Prometheus version to v2.4.3
Copies prometheus.yml file to the working dir
Modifies configurations in Prometheus to leverage new MON exporter.
Modifies OSM Sample Dashboard at Grafana to point to new metric names.
Removes "Kafka Exporter" container (previous workaround to get metrics from bus)

Signed-off-by: lavado <glavado@whitestack.com>
Change-Id: I15451f717d9ee1cfbdee266a84ed29398360ed94
diff --git a/installers/docker/prometheus.yml b/installers/docker/prometheus.yml
new file mode 100644
index 0000000..2d535a0
--- /dev/null
+++ b/installers/docker/prometheus.yml
@@ -0,0 +1,45 @@
+# Copyright 2018 The Prometheus Authors
+# Copyright 2018 Whitestack
+# Copyright 2018 Telefonica Investigacion y Desarrollo, S.A.U.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# my global config
+global:
+  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # scrape_timeout is set to the global default (10s).
+
+# Alertmanager configuration
+alerting:
+  alertmanagers:
+  - static_configs:
+    - targets:
+      # - alertmanager:9093
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: 'prometheus'
+
+    # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+
+    static_configs:
+    - targets: ['mon:8000']