Updating configuration (#197)

#### Added

- [ACME] Display warning about sudo usage when issuing certificate with DNS API validation (require `sudo -E`)

#### Changed

- [ACME] Resolve domain IP over HTTPS with Cloudflare DNS Resolver
- [CORE] Cement Framework updated to v2.10.2
- [SITE] database name = 0 to 16 characters from the site name + 4 randomly generated character
- [SITE] database user = 0 to 12 characters from the site name + 4 randomy generated character
- [STACK] Improve sysctl tweak deployment

#### Fixed

- [SITE] https redirection missing on subdomains sites
- Issues with digitalocean mariadb repository
- Cement Framework output handler issues
- [CLEAN] check if Nginx is installed before purging fastcgi or opcache

tests/cli/plugins/test_example.py

@@ -1,9 +0,0 @@
-"""Tests for Example Plugin."""
-
-from wo.utils.test import WOTestCase
-
-
-class ExamplePluginTestCase(WOTestCase):
-    def test_load_example_plugin(self):
-        self.app.setup()
-        self.app.plugin.load_plugin('example')