Moved UTM_MGRS_test to correct location.

Moved the UTM_MGRS_test class to the correct location. It should be in
the test folder so that it gets executed as part of the unit tests.

Author: wcmatthysen

src/gov/nasa/worldwind/geom/coords/UTM_MGRS_test.java renamed to test/gov/nasa/worldwind/geom/coords/UTM_MGRS_test.java

@@ -1,8 +1,7 @@
 package gov.nasa.worldwind.geom.coords;
 
-import org.junit.Test;
-
 import gov.nasa.worldwind.geom.LatLon;
+import org.junit.Test;
 
 public class UTM_MGRS_test {