Adding data file dropbox and s3 tests

Author: jamesatha

src/test/java/DataFileDropboxTest.java

@@ -0,0 +1,8 @@
+public class DataFileDropboxTest extends DataFileGenericTest {
+    private static final String pathPrefix = "dropbox://test/";
+
+    @Override
+    public String getFullPath(String thing) {
+        return pathPrefix + thing;
+    }
+}

src/test/java/DataFileS3Test.java

@@ -0,0 +1,8 @@
+public class DataFileS3Test extends DataFileGenericTest {
+    private static final String pathPrefix = "s3://james-what/";  // This could be an environment variable or something
+
+    @Override
+    public String getFullPath(String thing) {
+        return pathPrefix + thing;
+    }
+}