[INTERNAL] moved project creation out of IPN

The IPN now requires that the projects must already exist.

Change-Id: I7af94e0ee7279a4e80d14865257666bf06e6098c
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1931
Tested-by: Jenkins CI
Reviewed-by: Holger Schmeisky <google@schmeisky.com>
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>