Fix Debian/RedHat setup

* Change yum repository from nginx to unit
* Remove apt task causing ansible to be non-idempotent

Author: alessfg

tasks/unit/setup-debian.yml

@@ -5,7 +5,3 @@
   with_items:
     - deb https://packages.nginx.org/unit/{{ ansible_distribution|lower }}/ {{ ansible_distribution_release }} unit
     - deb-src https://packages.nginx.org/unit/{{ ansible_distribution|lower }}/ {{ ansible_distribution_release }} unit
-
-- name: "(Install: Debian/Ubuntu) Update APT Cache"
-  apt:
-    update_cache: yes

tasks/unit/setup-redhat.yml

@@ -1,18 +1,18 @@
 ---
-- name: "(Install: RedHat) Add NGINX Unit Repository"
+- name: "(Install: CentOS/RedHat) Add NGINX Unit Repository"
   yum_repository:
-    name: nginx
+    name: unit
     baseurl: https://packages.nginx.org/unit/{{ (ansible_distribution == "RedHat") | ternary('rhel/', 'centos/') }}$releasever/$basearch/
-    description: NGINX Repository
+    description: NGINX Unit Repository
     enabled: yes
     gpgcheck: yes
   when: ansible_distribution != "Amazon"
 
 - name: "(Install: Amazon Linux) Add NGINX Unit Repository"
   yum_repository:
-    name: nginx
+    name: unit
     baseurl: https://packages.nginx.org/unit/amzn/$releasever/$basearch/
-    description: NGINX Repository
+    description: NGINX Unit Repository
     enabled: yes
     gpgcheck: yes
   when: ansible_distribution == "Amazon"