Added Tarjan SCC computation algorithm and associated tests.
diff --git a/utils/misc/src/test/java/org/onlab/graph/GraphTest.java b/utils/misc/src/test/java/org/onlab/graph/GraphTest.java
index 44b1137..5c930c4 100644
--- a/utils/misc/src/test/java/org/onlab/graph/GraphTest.java
+++ b/utils/misc/src/test/java/org/onlab/graph/GraphTest.java
@@ -19,7 +19,7 @@
     static final TestVertex H = new TestVertex("H");
     static final TestVertex Z = new TestVertex("Z");
 
-    protected Graph<TestVertex, TestEdge> g;
+    protected Graph<TestVertex, TestEdge> graph;
 
     protected EdgeWeight<TestVertex, TestEdge> weight =
             new EdgeWeight<TestVertex, TestEdge>() {
@@ -35,7 +35,7 @@
         }
     }
 
-    protected Set<TestVertex> vertices() {
+    protected Set<TestVertex> vertexes() {
         return of(A, B, C, D, E, F, G, H);
     }