TENTACLES-8 NexusClient not closing connections

* Applying patch from Andy Gumprecht to raise number of connections.

* Reformatted, added constants.
* Removed unused dependency to httpcore.
* Remove resource-leakage-warning by extracting encapsulated inputStream.



git-svn-id: https://svn.apache.org/repos/asf/creadur/tentacles/trunk@1624903 13f79535-47bb-0310-9956-ffa450edef68