NMS-6642: Document CiscoPingMibMonitor

- Migrate pull request to OpenNMS devel instead development/docs
Fixed format convention
Merge branch 'NMS-6642-doc-ciscopingmibmonitor' of https://github.com/indigo423/opennms into indigo423-NMS-6642-doc-ciscopingmibmonitor

Conflicts:
	opennms-doc/guide-admin/src/asciidoc/index.adoc
NMS-6642: Documentation CiscoPingMibMonitor

- Merge branch 'indigo423-NMS-6642-doc-ciscopingmibmonitor' into develop