heat-agent: Do not use absolute path
heat-agent: Do not use absolute path

In a recent version of fedora base and
python/pip that comes with it, pip installed
pkgs put their binaries in /usr/local/bin
instead of /usr/bin. Since the lanuch script is
a bash script we do not have to use the absolute
path.

Change-Id: I9f31d047fe538114136d2199b447e3fe8248aa8c
Signed-off-by: Spyros Trigazis <1e6dbf5402ced737cda15d668682ea874352489e@cern.ch>

ArchiFleKs/magnum,openstack/magnum,openstack/magnum,ArchiFleKs/magnum