simplify roles organization and renames

roles/msmonitor/defaults/main.yml

roles/msmonitor/handlers/main.yml

roles/msmonitor/meta/main.yml

roles/msmonitor/tasks/main.yml

roles/netcapture/defaults/main.yml

roles/netcapture/meta/main.yml

roles/netcapture/tasks/main.yml

roles/network/defaults/main.yml

roles/network/tasks/main.yml

roles/nginx/defaults/main.yml

roles/nginx/handlers/main.yml

roles/nginx/tasks/_certs.yml

roles/nginx/tasks/_config.yml

roles/nginx/tasks/_install.yml

roles/nginx/tasks/main.yml

roles/postgres/tasks/main.yml

roles/proxy/tasks/main.yml

roles/python/tasks/main.yml

roles/wowza/meta/main.yml

roles/wowza/tasks/main.yml