Separate unit-test data from integ-test samples

- Upgraded `samples/basic` to use latest Gradle version.

__tests__/samples/basic/.gitattributes

@@ -0,0 +1,6 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# These are explicitly windows files and should use crlf
+*.bat           text eol=crlf
+