ci: CI report generation

ci: CI report generation

Script for generation of documentation has been moved from releng
into new opnfvdocs repository. VSPERF script for a daily CI job is
calling this script for overall PDF report generation. Thus it must
be updated to use new script location.

JIRA: VSPERF-324

Change-Id: I173a2139c57c39acb25c14f7a082e0ff0a888b2f
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: <bmichalo@redhat.com>