Remove the tag hash that contains the org and space from the start app message, since loggregator does not need the space and org anymore

Signed-off-by: Johannes Tuchscherer <jtuchscherer@pivotallabs.com>
Merge pull request #52 from cloudfoundry/tag_hash_removal

Remove the tag hash with org and space from the start app message

@jfoley  /@ryantang