Large cleanup of unnecessary and unused TPCC code (yugabyte#71)

Remove a ton of dead code, replace custom utilities with already included library utilities, and fix a bunch of IntelliJ generated warnings.

Author: robertsami

.gitignore

@@ -1,3 +1,4 @@
+target
 build/
 lib/
 results/

README.md

@@ -52,7 +52,6 @@ A utility script (./tpccbenchmark) is provided for running the benchmark. The op
    --clear <arg>             Clear all records in the database for this
                              benchmark
    --create <arg>            Initialize the database for this benchmark
-   --dialects-export <arg>   Export benchmark SQL to a dialects file
    --execute <arg>           Execute the benchmark workload
 -h,--help                    Print this help
    --histograms              Print txn histograms

src/com/oltpbenchmark/BenchmarkState.java

@@ -38,17 +38,12 @@ public long getTestStartNs() {
   }
 
   private final CountDownLatch startBarrier;
-  private AtomicInteger notDoneCount;
+  private final AtomicInteger notDoneCount;
 
   // Protected by this
 
   /**
-   *
-   * @param numThreads
-   *            number of threads involved in the test: including the
-   *            master thread.
-   * @param rateLimited
-   * @param queueLimit
+   * @param numThreads number of threads involved in the test: including the master thread.
    */
   public BenchmarkState(int numThreads) {
     startBarrier = new CountDownLatch(numThreads);