require admin role to use update-alternatives

promote `update-alternatives` command to run as admin role

tasks/java.yml

@@ -14,6 +14,7 @@
 
 - name: Get the installed java path
   shell: "update-alternatives --display java | grep '^/' | awk '{print $1}' | grep 1.8.0"
+  become: yes
   register: java_full_path
   failed_when: False
   changed_when: False