[MACROS] log warning when a macro loading fail (#1825)
[MACROS] log warning when a macro loading fail (#1825)

Macro loading was failing silently, this patch fix this behaviour.
superdesk/superdesk-core,petrjasek/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core