Update ansible (ubuntu server 14)
From Ansible website:
1) First remove installed version of ansible using sudo apt-get remove --purge ansible
2) Now add the correct ppa using sudo apt-add-repository ppa:ansible/ansible
3) Update the package list: sudo apt-get update
4) Install ansible: sudo apt-get install ansible
I had the same issues as you. Above steps worked like a charm :)
Are you sure you installed it correctly? The version in the PPA for 14.04 is 1.9.4-1, so I don't know where 1.5.5 would be coming from.
In any case, you could try erasing ansible (sudo apititude erase ansible
should work), and installing ansible with pip as per http://docs.ansible.com/ansible/intro_installation.html#latest-releases-via-pip
(Namely, have pip installed, then run pip install --upgrade ansible
)