HC Tests: move honeycomb tests out of vpp directory

https://gerrit.fd.io/r/#/c/9257/ moved VPP instalation
to vpp/func/__init__.robot,
which is run before Honeycomb suite.

Instalation process starts with removing all vpp packages,
which fails because of honeycomb dependency installed by bootstrap script.

This patch fixes HC func jobs by moving them to separate dir.
The honeycomb/func/__init__.robot was updated
to include previous content of vpp/func/__init__.robot.

HC perf jobs were also moved,
but they may require additional care (CSIT-1006).

Change-Id: I99d94272c80a4c57c85ec5cf99cddfbeab7de663
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>