Fix for bug 3091320 validate passes if there is no import schema.
Fix for bug 3091320 validate passes if there is no import schema.

bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,cezarfx/zorba