Adapted: become: yes -> become:true

roles/elastic-stack/ansible-elasticsearch/tasks/Debian.yml

@@ -25,7 +25,7 @@
     - ansible_distribution_major_version | int == 14
 
 - name: Install Oracle Java 8
-  become: yes
+  become: true
   apt: name=openjdk-8-jdk state=latest
 
   when:

roles/elastic-stack/ansible-elasticsearch/tasks/main.yml

@@ -202,7 +202,7 @@
     path: /etc/security/limits.conf
     line: elasticsearch - memlock unlimited
     create: yes
-  become: yes
+  become: true
   when:
     - ansible_distribution == "Ubuntu"
     - ansible_distribution_major_version | int == 14
@@ -213,7 +213,7 @@
     path: /etc/security/limits.d/elasticsearch.conf
     line: elasticsearch - memlock unlimited
     create: yes
-  become: yes
+  become: true
   changed_when: false
   when:
     - ansible_distribution == "Ubuntu"