fixes call to getCachingHeaders
fixes call to getCachingHeaders

kaltura/mwEmbed,panda-os/mwEmbed,slash851/mwEmbed,alexmilk/mwEmbed,DBezemer/mwEmbed,safarijv/mwEmbed,DBezemer/mwEmbed,omridevk/mwEmbed,panda-os/mwEmbed,panda-os/mwEmbed,DBezemer/mwEmbed,slash851/mwEmbed,joanpuigsanz/mwEmbed,bordar/mwEmbed,FlixMaster/mwEmbed,abaylis/mwEmbed,matsuu/mwEmbed,bordar/mwEmbed,tanyaLibatter/mwEmbed,kaltura/mwEmbed,tanyaLibatter/mwEmbed,matsuu/mwEmbed,SVSG/mwEmbed,safarijv/mwEmbed,tanyaLibatter/mwEmbed,abaylis/mwEmbed,bordar/mwEmbed,slash851/mwEmbed,alexmilk/mwEmbed,vladm3/mwEmbed,FlixMaster/mwEmbed,safarijv/mwEmbed,FlixMaster/mwEmbed,kaltura/mwEmbed,safarijv/mwEmbed,omridevk/mwEmbed,vladm3/mwEmbed,alexmilk/mwEmbed,abaylis/mwEmbed,vladm3/mwEmbed,omridevk/mwEmbed,FlixMaster/mwEmbed,matsuu/mwEmbed,abaylis/mwEmbed,alexmilk/mwEmbed,SVSG/mwEmbed,SVSG/mwEmbed,matsuu/mwEmbed,bordar/mwEmbed,omridevk/mwEmbed,slash851/mwEmbed,tanyaLibatter/mwEmbed,panda-os/mwEmbed,joanpuigsanz/mwEmbed,DBezemer/mwEmbed,joanpuigsanz/mwEmbed,vladm3/mwEmbed,kaltura/mwEmbed,joanpuigsanz/mwEmbed,SVSG/mwEmbed