Added HTTP Header 'X-Description' to API error responses.
Added HTTP Header 'X-Description' to API error responses.

For easy access to API error descriptions in the CloudBridge.

cinderella/incubator-cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,mufaddalq/cloudstack-datera-driver,GabrielBrascher/cloudstack,cinderella/incubator-cloudstack,mufaddalq/cloudstack-datera-driver,jcshen007/cloudstack,argv0/cloudstack,jcshen007/cloudstack,resmo/cloudstack,argv0/cloudstack,DaanHoogland/cloudstack,cinderella/incubator-cloudstack,mufaddalq/cloudstack-datera-driver,resmo/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,resmo/cloudstack,jcshen007/cloudstack,argv0/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,argv0/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,wido/cloudstack,jcshen007/cloudstack,wido/cloudstack,resmo/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,resmo/cloudstack,wido/cloudstack,wido/cloudstack,jcshen007/cloudstack,cinderella/incubator-cloudstack,mufaddalq/cloudstack-datera-driver,jcshen007/cloudstack,argv0/cloudstack,wido/cloudstack,mufaddalq/cloudstack-datera-driver,DaanHoogland/cloudstack,DaanHoogland/cloudstack,wido/cloudstack,cinderella/incubator-cloudstack,mufaddalq/cloudstack-datera-driver,argv0/cloudstack,GabrielBrascher/cloudstack,DaanHoogland/cloudstack