Switch to different repo, improve installation

Signed-off-by: Knut Ahlers <knut@ahlers.me>

defaults/main.yml

@@ -3,4 +3,6 @@
 instance_status_apt_required: []
 instance_status_checks: {}
 
+instance_status_version: v0.5.2
+
 ...

tasks/main.yml

@@ -11,19 +11,17 @@
     dest: /etc/elb-instance-status.yml
   register: instance_status_config
 
+- name: Get current elb-instance-status version
+  command: /usr/local/bin/elb-instance-status --version
+  register: instance_status_version_cmd
+
 - name: Download elb-instance-status release
   get_url:
-    url: https://github.com/Jimdo/elb-instance-status/releases/download/v0.5.1/elb-instance-status_linux_amd64
+    url: 'https://github.com/Luzifer/elb-instance-status/releases/download/{{ instance_status_version }}/elb-instance-status_linux_amd64'
-    dest: /usr/local/bin/elb-instance-status_v0.5.1
-    sha256sum: 3ce2fa44296e2ff5b2cca2e9b2348bbd49884eadfe66389ec6d201f5e71650c0
-    mode: 0755
-
-- name: Link elb-instance-status
-  file:
     dest: /usr/local/bin/elb-instance-status
-    src: /usr/local/bin/elb-instance-status_v0.5.1
+    mode: 0755
-    state: link
+  when: instance_status_version not in instance_status_version_cmd.output
-  register: instance_status_link
+  register: instance_status_binary
 
 - name: Install system.d service
   copy:
@@ -53,4 +51,4 @@
     name: elb-instance-status
     state: restarted
     enabled: yes
-  when: instance_status_config.changed or instance_status_service.changed or instance_status_service.changed
+  when: instance_status_config.changed or instance_status_binary.changed or instance_status_service.changed