do not attempt resource render if path is not set and its empty

Author: wildone

aemdesign-aem-common/src/main/content/jcr_root/apps/aemdesign/components/content/reference/v2/reference/variant.default.html

@@ -1,6 +1,7 @@
 <template data-sly-template.variant="${@ componentProperties}">
     <div style="${componentProperties.attr.data.style @ context = 'unsafe'}"
          data-sly-attribute="${componentProperties.attr.data @ context = 'unsafe'}">
-        <sly data-sly-resource="${componentProperties.path @ wcmmode=componentProperties.wcmmode, selectors=componentProperties.selectors}"></sly>
+        <sly data-sly-test="${componentProperties.path && !componentProperties.isEmpty}"
+             data-sly-resource="${componentProperties.path @ wcmmode=componentProperties.wcmmode, selectors=componentProperties.selectors}"></sly>
     </div>
-</template>
+</template>