Addition compile error fixes

The only remaining compile errors in TitanGraphTest following this
commit should be inside testTinkerPopOptimizationStrategies and the
private helper method called only by that method (assertNumStep).  It
is possible to refactor this test to be TP3-strategy-oblivious, but
then much of its distinctive value would be lost.  Leaving it broken
for the time being.

I gave this only one close read through the git-diff before
committing.  This hasn't been tested at all.  There could easily be
some runtime errors in here that I missed.

titan-test/src/main/java/com/thinkaurelius/titan/graphdb/TitanGraphConcurrentTest.java

@@ -1,11 +1,13 @@
 package com.thinkaurelius.titan.graphdb;
 
+import com.google.common.collect.Iterables;
 import com.thinkaurelius.titan.core.*;
 import com.thinkaurelius.titan.core.schema.EdgeLabelMaker;
 import com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration;
 import com.thinkaurelius.titan.testcategory.PerformanceTests;
 import com.thinkaurelius.titan.testutil.JUnitBenchmarkProvider;
 import com.thinkaurelius.titan.testutil.RandomGenerator;
+import org.apache.tinkerpop.gremlin.structure.Direction;
 import org.apache.tinkerpop.gremlin.structure.Edge;
 import org.apache.tinkerpop.gremlin.structure.Vertex;
 import org.junit.After;
@@ -370,8 +372,8 @@ public FixedRelationshipMaker(TitanTransaction tx,
         public void run() {
             while (true) {
                 // Make or break relType between two (possibly same) random nodes
-                TitanVertex source = getOnlyElement(tx.query().has(idKey, 0).vertices());
-                TitanVertex sink = getOnlyElement(tx.query().has(idKey, 1).vertices());
+                TitanVertex source = Iterables.<TitanVertex>getOnlyElement(tx.query().has(idKey, 0).vertices());
+                TitanVertex sink = Iterables.<TitanVertex>getOnlyElement(tx.query().has(idKey, 1).vertices());
                 for (Edge r : source.outE(elabel).toList()) {
                     if (getId(r.inV().next()) == getId(sink)) {
                         r.remove();
@@ -405,12 +407,12 @@ public SimpleReader(TitanTransaction tx, CountDownLatch startLatch,
 
         @Override
         protected void doRun() throws Exception {
-            TitanVertex v = getOnlyElement(tx.query().has(idKey, vertexid).vertices());
+            TitanVertex v = Iterables.<TitanVertex>getOnlyElement(tx.query().has(idKey, vertexid).vertices());
 
             for (int i = 0; i < nodeTraversalCount; i++) {
-                assertCount(expectedEdges, v.bothE(label2Traverse));
-                for (Edge r : v.outE(label2Traverse).toList()) {
-                    v = r.inV().next();
+                assertCount(expectedEdges, v.query().labels(label2Traverse).direction(Direction.BOTH).edges());
+                for (TitanEdge r : v.query().direction(Direction.OUT).labels(label2Traverse).edges()) {
+                    v = r.vertex(Direction.IN);
                 }
             }
         }
@@ -465,7 +467,7 @@ public VertexPropertyQuerier(int propCount, int vertexCount) {
         public void run() {
             for (int i = 0; i < vertexCount; i++) {
                 for (int p = 0; p < propCount; p++) {
-                    tx.V().has("p" + p, i).count().next();
+                    Iterables.size(tx.query().has("p" + p, i).vertices());
                 }
             }
         }