Add possibility to download raw logs from the rest api

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
add test for raw rest endpoint

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
test and docs for raw logs

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
add link to download the raw log.

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
fix dataspec error reporting

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
one sentence per line

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>
Merge pull request #1342 from tardyp/rawlogs

Rawlogs: download raw logs as files