Add mediawiki_server to all.tmpl local files

...tions/100Change2017/ansible/inv/local/group_vars/all.tmpl

...0Change2017Partners/ansible/inv/local/group_vars/all.tmpl

...tions/100Change2020/ansible/inv/local/group_vars/all.tmpl

...s/100Change2020Demo/ansible/inv/local/group_vars/all.tmpl

...titions/Climate2030/ansible/inv/local/group_vars/all.tmpl

competitions/DemoView/ansible/inv/local/group_vars/all.tmpl

competitions/ECW2020/ansible/inv/local/group_vars/all.tmpl

competitions/EO2020/ansible/inv/local/group_vars/all.tmpl

...etitions/GlobalView/ansible/inv/local/group_vars/all.tmpl

competitions/LLIIA2020/ansible/inv/local/group_vars/all.tmpl

...itions/LoneStar2020/ansible/inv/local/group_vars/all.tmpl

...ns/RacialEquity2030/ansible/inv/local/group_vars/all.tmpl

competitions/template/ansible/inv/local/group_vars/all.tmpl