Use protocol version without encryption to support older Debian and Ubuntu releases.

Fixes Travis CI error: 'HTTP fetch error 1: unsupported protocol'

Author: georgyberdyshev

tasks/keys/apt-key.yml

@@ -2,4 +2,4 @@
 - name: "(Install: APT OSs) Add APT NGINX Signing Key"
   apt_key:
     id: 573BFD6B3D8FBC641079A6ABABF5BD827BD9BF62
-    keyserver: hkps://hkps.pool.sks-keyservers.net:443
+    keyserver: hkp://p80.pool.sks-keyservers.net:80