Make harep identify itself in the reason trail
Make harep identify itself in the reason trail

As harep is a tool submitting jobs, make it identify itself
in the reason trail. Also allow giving a reason for calling
harep to be able to pass on further information, which can
also be used in job filtering.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Helga Velroyen <2d0126b1ec6f9ec5cbec4a7012aa14faeaef10f5@google.com>

onponomarev/ganeti,grnet/snf-ganeti,ganeti/ganeti,leshchevds/ganeti,leshchevds/ganeti,bitemyapp/ganeti,bitemyapp/ganeti,andir/ganeti,andir/ganeti,grnet/snf-ganeti,yiannist/ganeti,onponomarev/ganeti,mbakke/ganeti,andir/ganeti,ganeti/ganeti,yiannist/ganeti,mbakke/ganeti,leshchevds/ganeti,ganeti/ganeti,yiannist/ganeti,mbakke/ganeti