Collect only the bare essentials in the GATKRunReport

Now looks like:
<GATK-run-report>
   <id>D7D31ULwTSxlAwnEOSmW6Z4PawXwMxEz</id>
   <start-time>2012/03/10 20.21.19</start-time>
   <end-time>2012/03/10 20.21.19</end-time>
   <run-time>0</run-time>
   <walker-name>CountReads</walker-name>
   <svn-version>1.4-483-g63ecdb2</svn-version>
   <total-memory>85000192</total-memory>
   <max-memory>129957888</max-memory>
   <user-name>depristo</user-name>
   <host-name>10.0.1.10</host-name>
   <java>Apple Inc.-1.6.0_26</java>
   <machine>Mac OS X-x86_64</machine>
   <iterations>105</iterations>
</GATK-run-report>

No longer capturing command line or directory information, to minimize people's concerns with phone home and privacy

public/java/src/org/broadinstitute/sting/gatk/phonehome/GATKRunReport.java

@@ -90,19 +90,12 @@ public class GATKRunReport {
     protected static Logger logger = Logger.getLogger(GATKRunReport.class);
 
 
-    // the listing of the fields is somewhat important; this is the order that the simple XML will output them
-    @ElementList(required = true, name = "gatk_header_Information")
-    private List<String> mGATKHeader;
-
     @Element(required = false, name = "id")
     private final String id;
 
     @Element(required = false, name = "exception")
     private final ExceptionToXML mException;
 
-    @Element(required = true, name = "working_directory")
-    private String currentPath;
-
     @Element(required = true, name = "start_time")
     private String startTime = "ND";
 
@@ -112,9 +105,6 @@ public class GATKRunReport {
     @Element(required = true, name = "run_time")
     private long runTime = 0;
 
-    @Element(required = true, name = "command_line")
-    private String cmdLine = "COULD NOT BE DETERMINED";
-
     @Element(required = true, name = "walker_name")
     private String walkerName;
 
@@ -127,9 +117,6 @@ public class GATKRunReport {
     @Element(required = true, name = "max_memory")
     private long maxMemory;
 
-    @Element(required = true, name = "java_tmp_directory")
-    private String tmpDir;
-
     @Element(required = true, name = "user_name")
     private String userName;
 
@@ -145,9 +132,6 @@ public class GATKRunReport {
     @Element(required = true, name = "iterations")
     private long nIterations;
 
-    @Element(required = true, name = "reads")
-    private long nReads;
-
     public enum PhoneHomeOption {
         /** Disable phone home */
         NO_ET,
@@ -172,15 +156,8 @@ public class GATKRunReport {
 
         logger.debug("Aggregating data for run report");
 
-        mGATKHeader = CommandLineGATK.createApplicationHeader();
-        currentPath = System.getProperty("user.dir");
-
         // what did we run?
         id = org.apache.commons.lang.RandomStringUtils.randomAlphanumeric(32);
-        try {
-            cmdLine = engine.createApproximateCommandLineArgumentString(engine, walker);
-        } catch (Exception ignore) { }
-
         walkerName = engine.getWalkerName(walker.getClass());
         svnVersion = CommandLineGATK.getVersionNumber();
 
@@ -191,7 +168,6 @@ public class GATKRunReport {
             startTime = dateFormat.format(engine.getStartTime());
             runTime = (end.getTime() - engine.getStartTime().getTime()) / 1000L; // difference in seconds
         }
-        tmpDir = System.getProperty("java.io.tmpdir");
 
         // deal with memory usage
         Runtime.getRuntime().gc(); // call GC so totalMemory is ~ used memory
@@ -202,12 +178,11 @@ public class GATKRunReport {
         if ( engine.getCumulativeMetrics() != null ) {
             // it's possible we aborted so early that these data structures arent initialized
             nIterations = engine.getCumulativeMetrics().getNumIterations();
-            nReads = engine.getCumulativeMetrics().getNumReadsSeen();
         }
 
         // user and hostname -- information about the runner of the GATK
         userName = System.getProperty("user.name");
-        hostName = "unknown"; // resolveHostname();
+        hostName = Utils.resolveHostname();
 
         // basic java information
         java = Utils.join("-", Arrays.asList(System.getProperty("java.vendor"), System.getProperty("java.version")));