For constency, changed method setOpBuilder to setOperationBuilder

Author: Lee Rhodes

src/main/java/com/yahoo/sketches/theta/Sketches.java

@@ -62,7 +62,7 @@ public static Sketch wrapSketch(Memory srcMem, long seed) {
    * Ref: {@link SetOperation#builder() SetOperation.builder()}
    * @return {@link SetOperation.Builder SetOperation.Builder}
    */
-  public static SetOperation.Builder setOpBuilder() {
+  public static SetOperation.Builder setOperationBuilder() {
     return SetOperation.builder();
   }
 

src/test/java/com/yahoo/sketches/theta/SketchesTest.java

@@ -16,7 +16,7 @@
 import static com.yahoo.sketches.theta.Sketches.getSerializationVersion;
 import static com.yahoo.sketches.theta.Sketches.heapifySetOperation;
 import static com.yahoo.sketches.theta.Sketches.heapifySketch;
-import static com.yahoo.sketches.theta.Sketches.setOpBuilder;
+import static com.yahoo.sketches.theta.Sketches.setOperationBuilder;
 import static com.yahoo.sketches.theta.Sketches.updateSketchBuilder;
 import static com.yahoo.sketches.theta.Sketches.wrapSetOperation;
 import static com.yahoo.sketches.theta.Sketches.wrapSketch;
@@ -58,7 +58,7 @@ public void checkSetOpMethods() {
     Memory mem1 = getCompactSketch(k, 0, k);
     Memory mem2 = getCompactSketch(k, k/2, 3*k/2);
 
-    SetOperation.Builder bldr = setOpBuilder();
+    SetOperation.Builder bldr = setOperationBuilder();
     Union union = bldr.buildUnion(2*k);
 
     union.update(mem1);