Updating helix to 0.6.2-incubating because of HELIX-257
Merge pull request #27 from mrietveld/apache-helix-security-update

Updating helix to 0.6.2-incubating because of HELIX-257
Removed classifier `classes` from `chemistry-opencmis-server-bindings`. This has been removed in the current 0.10.0 version.