Revert setuptools version for jython-2.7-beta1 (2.0.1 -> 2.0)

Could not install setuptools 2.0.1 for jython-2.7-beta1 by the
lack of `parser` module.

plugins/python-build/share/python-build/jython-2.7-beta1

@@ -1,6 +1,6 @@
 require_java
 install_jar "Jython-2.7-beta1" "http://search.maven.org/remotecontent?filepath=org/python/jython-installer/2.7-b1/jython-installer-2.7-b1.jar" jython
-install_package "setuptools-2.0.1" "https://pypi.python.org/packages/source/s/setuptools/setuptools-2.0.1.tar.gz#04aedc705644fda5848b7b428774e5ff" python
+install_package "setuptools-2.0" "https://pypi.python.org/packages/source/s/setuptools/setuptools-2.0.tar.gz#887cdf417bc5d25326c66bb98c0dd160" python
 # pip (>= 1.3) does not work properly since it uses HTTPS for downloads
 # * https://github.com/yyuu/pyenv/issues/15
 install_package "pip-1.2.1" "https://pypi.python.org/packages/source/p/pip/pip-1.2.1.tar.gz#db8a6d8a4564d3dc7f337ebed67b1a85" python