OAK-11640 : revert unintendent code change

Author: Rishabh Kumar

oak-segment-azure/src/test/java/org/apache/jackrabbit/oak/segment/azure/v8/AzureSegmentStoreV8Test.java

@@ -72,7 +72,7 @@ public class AzureSegmentStoreV8Test {
 
     private static final EnumSet<SharedAccessBlobPermissions> READ_ONLY = EnumSet.of(READ, LIST);
     private static final EnumSet<SharedAccessBlobPermissions> READ_WRITE = EnumSet.of(READ, LIST, CREATE, WRITE, ADD);
-    private static final Set<String> BLOBS = ImmutableSet.of("blob1", "blob2");
+    private static final ImmutableSet<String> BLOBS = ImmutableSet.of("blob1", "blob2");
 
     private CloudBlobContainer container;