pleiades-ansible roles installation fails on new relic

[paregorios]

See #425 and then:

ansible-galaxy role install -r install_roles.yml 
- downloading role 'unattended-upgrades', owned by jnv
- downloading role from https://github.com/jnv/ansible-role-unattended-upgrades/archive/v1.2.0.tar.gz
- extracting jnv.unattended-upgrades to /Users/paregorios/Documents/files/P/pleiades_webapp/pleiades-ansible/roles/jnv.unattended-upgrades
- jnv.unattended-upgrades (v1.2.0) was installed successfully
- downloading role 'management-user', owned by GROG
- downloading role from https://github.com/GROG/ansible-role-management-user/archive/v1.2.0.tar.gz
- extracting GROG.management-user to /Users/paregorios/Documents/files/P/pleiades_webapp/pleiades-ansible/roles/GROG.management-user
- GROG.management-user (v1.2.0) was installed successfully
- adding dependency: GROG.user
- adding dependency: GROG.authorized-key
- adding dependency: GROG.sudo
- downloading role 'apache', owned by geerlingguy
- downloading role from https://github.com/geerlingguy/ansible-role-apache/archive/2.1.2.tar.gz
- extracting geerlingguy.apache to /Users/paregorios/Documents/files/P/pleiades_webapp/pleiades-ansible/roles/geerlingguy.apache
- geerlingguy.apache (2.1.2) was installed successfully
- downloading role 'postfix', owned by geerlingguy
- downloading role from https://github.com/geerlingguy/ansible-role-postfix/archive/1.1.0.tar.gz
- extracting geerlingguy.postfix to /Users/paregorios/Documents/files/P/pleiades_webapp/pleiades-ansible/roles/geerlingguy.postfix
- geerlingguy.postfix (1.1.0) was installed successfully
- downloading role 'logrotate', owned by nickhammond
- downloading role from https://github.com/nickhammond/ansible-logrotate/archive/9c40f66949c2ff65d51a830f5ed05f565f766ead.tar.gz
- extracting nickhammond.logrotate to /Users/paregorios/Documents/files/P/pleiades_webapp/pleiades-ansible/roles/nickhammond.logrotate
- nickhammond.logrotate (9c40f66949c2ff65d51a830f5ed05f565f766ead) was installed successfully
- downloading role 'newrelic', owned by franklinkim
[WARNING]: - franklinkim.newrelic was NOT installed successfully: - sorry, franklinkim.newrelic was not found on https://galaxy.ansible.com/api/.
ERROR! - you can use --ignore-errors to skip failed roles and finish processing the list.
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