[ANALYZER-2030] Multi-chart exported to Excel and PDF does not render co...

Depends on commits:
https://github.com/webdetails/cdf/commit/4e157d8c08ec990c5a8d23292af7d05944d21440
https://github.com/webdetails/cgg/commit/412e72f70cfe4a0f42869204250083d9dfb4d0fb