Integrate OSMOSE issue voltage filtering on OhMyGrid website

[Mwiche96]

[flacombe]

It's still WIP and need some Osmose frontend fix to restablish the tagging in json export
osmose-qa/osmose-frontend#536

OMG PR by @Mwiche96 : #60

[Mwiche96]

• If pole supports high voltage then keep
• pole below threshold should be removed