GER-1319: Updated gitignore
GER-1319: Updated gitignore

Added node modules directory to ignore file

Set node modules to be ignored from changes to the repo as they should
not be commited.

Change-Id: I546e563e436a507da736a1a8fa568a1b001e779d

WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit,WANdisco/gerrit