The 'register:' meta is not templatable

handlers/main.yml

@@ -5,4 +5,3 @@
 - name: Restart the springboot webservice
   service: name={{ item.name }} state=restarted
   with_items: '{{ springboot_apps }}'
-  when: restart_{{ item.name }} is defined

tasks/main.yml

@@ -23,7 +23,6 @@
   - name: Download the {{ item.name }} artifact from {{ maven_baseurl }}
     maven_artifact: artifact_id={{ item.maven_id }} version={{ item.maven_version | default('latest') }} group_id={{ item.maven_group_id }} extension={{ item.maven_extension | default('war') }} repository_url={{ item.maven_repo_url }} dest={{ item.install_dir }}/{{ item.name }}.{{ item.maven_extension | default('war') }}  verify_checksum=always mode='0644'
     with_items: '{{ springboot_apps }}'
-    register: 'restart_{{ item.name }}'
     when: item.maven_repo_url is defined
     notify: Restart the springboot webservice
 
@@ -40,7 +39,6 @@
   - name: Install the {{ item.name }} configuration starting from the template
     template: src=/var/tmp/.{{ item.app_conf_file }}.j2 dest={{ item.install_dir }}/{{ item.app_conf_file }} owner=root group={{ item.user }} mode=0440
     with_items: '{{ springboot_apps }}'
-    register: 'restart_{{ item.name }}'
     when: item.app_conf_file is defined
     notify: Restart the springboot webservice
 
@@ -63,7 +61,6 @@
   - name: Install the {{ item.name }} configuration starting from the template
     template: src=/var/tmp/.{{ item.logback_file }}.j2 dest={{ item.install_dir }}/{{ item.logback_file }} owner=root group={{ item.user }} mode=0440
     with_items: '{{ springboot_apps }}'
-    register: 'restart_{{ item.name }}'
     when: item.logback_file is defined
     notify: Restart the springboot webservice