Fix publishing of floating point values.
Added multi-instance support to Elasticsearch collector, minor unittest fixes

Change-Id: I26be1da78a2d52747d4ee959a1c00676e948e43d
Changes allow for a list of matches and include kafka stats by default.
network: let 'greed' match 0 character

This is useful for the 'lo' interface
Merge pull request #717 from gitarzysta/master

Fix publishing of floating point values.
Merge pull request #716 from datacratic/greed-star

network: let 'greed' match 0 character
Merge pull request #715 from ddreggors/development

Changes allow for a list of matches and include kafka stats by default.
Merge pull request #714 from rtoma/es-multi

Added multi-instance support to Elasticsearch collector, minor unittest fixes