switch httpclient to 4.0.1 since that's the one that android sdk depends on
switch httpclient to 4.0.1 since that's the one that android sdk depends on

https://codereview.appspot.com/6927056/

coursera4ashok/google-oauth-java-client,aungzanbaw/google-oauth-java-client,googleapis/google-oauth-java-client,chanseokoh/google-oauth-java-client,coursera4ashok/google-oauth-java-client,markyen/google-oauth-java-client,googleapis/google-oauth-java-client,wgpshashank/google-oauth-java-client,markyen/google-oauth-java-client,GoProjectOwner/google-oauth-java-client,GoProjectOwner/google-oauth-java-client,chanseokoh/google-oauth-java-client,wgpshashank/google-oauth-java-client,googleapis/google-oauth-java-client,aungzanbaw/google-oauth-java-client