Squash of:
* Include plugins in the report
* show plugin list in the UI
* moving metric and metadata templates into the probe reports
* update js for prime -> priority
* added retry to plugin handshake
* added iowait plugin
* review feedback
* plugin documentation
* Ensure connection rows have unique IDs.
This adds new types for connections tables.
* UI support for new connection table rows
* Parameterized node Id key for connections table
* also s/node_id/nodeId, and s/topology_id/topologyId in connections
* table
* Added comment about nodeIdKey
* Review feedback:
Squash of:
- use detailed.Summaries to render topology nodes
- ban merging nodes of different topologies (they should be mapped)
- need to prune parents when mapping node types
- render container images by id if they have no name
- remove separate render ids and prune parents in NewDerived*
- don't render metrics/metadata for groups of nodes
- fixing up tests
- removing pending unit tests (for mapping.go, for now)
- updating experimental dir for RenderableNode removal