Fix typo with docker-ce package versions (#4236)

roles/container-engine/docker/vars/debian.yml

@@ -14,7 +14,7 @@ docker_versioned_pkg:
   '17.12': docker-ce=17.12.1~ce-0~debian
   '18.03': docker-ce=18.03.1~ce-0~debian
   '18.06': docker-ce=18.06.2~ce~3-0~debian
-  '18.09': docker-ce_18.09.2~3-0~debian-{{ ansible_distribution_release|lower }}
+  '18.09': docker-ce=18.09.2~3-0~debian-{{ ansible_distribution_release|lower }}
   'stable': docker-ce=18.06.2~ce~3-0~debian
   'edge': docker-ce=17.12.1~ce-0~debian
 

roles/container-engine/docker/vars/ubuntu-amd64.yml

@@ -11,7 +11,7 @@ docker_versioned_pkg:
   '17.09': docker-ce=17.09.0~ce-0~ubuntu-{{ ansible_distribution_release|lower }}
   '17.12': docker-ce=17.12.1~ce-0~ubuntu-{{ ansible_distribution_release|lower }}
   '18.06': docker-ce=18.06.2~ce~3-0~ubuntu
-  '18.09': docker-ce_18.09.2~3-0~ubuntu-{{ ansible_distribution_release|lower }}
+  '18.09': docker-ce=18.09.2~3-0~ubuntu-{{ ansible_distribution_release|lower }}
   'stable': docker-ce=18.06.2~ce~3-0~ubuntu
   'edge': docker-ce=18.09.2~ce~3-0~ubuntu
 

roles/container-engine/docker/vars/ubuntu-arm64.yml

@@ -7,9 +7,9 @@ docker_versioned_pkg:
   '17.09': docker-ce=17.09.1~ce-0~ubuntu
   '17.12': docker-ce=17.12.1~ce-0~ubuntu-{{ ansible_distribution_release|lower }}
   '18.06': docker-ce=18.06.2~ce~3-0~ubuntu
-  '18.09': docker-ce_18.09.2~3-0~ubuntu-{{ ansible_distribution_release|lower }}
+  '18.09': docker-ce=18.09.2~3-0~ubuntu-{{ ansible_distribution_release|lower }}
   'stable': docker-ce=18.06.2~ce~3-0~ubuntu
-  'edge': docker-ce_18.09.2~3-0~ubuntu-{{ ansible_distribution_release|lower }}
+  'edge': docker-ce=18.09.2~3-0~ubuntu-{{ ansible_distribution_release|lower }}
 
 docker_package_info:
   pkg_mgr: apt