### Motivation
I tried to follow the Aws deployment guide at https://pulsar.apache.org/docs/en/deploy-aws/ but found it was pretty outdated - It was trying to install pulsar 2.1.0-incubating. This PR updates it to install 2.6.0.

### Modifications

* Updated the pulsar version to 2.6.0
  * Fixed download location for 2.6.0
  * Updated config files for 2.6.0
  * Fixed connector installation for 2.6.0
  * Fixed Ansible's yum warning about installing multiple packages