Fix cosmetic problems in YAML source

This change corrects problems reported by the `yamllint` linter.

Since key duplication problems were removed in 4d48711, this commit
mainly fixes trailing spaces and extra empty lines at beginning/end of
files.

test/utils/ansible-playbook_integration_runner/ec2.yml

@@ -38,4 +38,3 @@
     ec2_vars: "{{ ec2.results[item.0]['instances'][0] }}"
     ec2_instance_ids: "{{ ec2.results[item.0]['instance_ids'] }}"
   with_indexed_items: slaves
-

test/utils/ansible-playbook_integration_runner/roles/ansible_test_deps/meta/main.yml

@@ -20,4 +20,3 @@ galaxy_info:
     - ansible
     - dependencies
 dependencies: []
-  

test/utils/ansible-playbook_integration_runner/roles/ansible_test_deps/tasks/main.yml

@@ -98,5 +98,3 @@
   sudo: true
   lineinfile: "dest=/etc/sudoers regexp='^Defaults[ ,       ]*requiretty'  line='#Defaults    requiretty'"
   when: ansible_os_family == 'RedHat'
-
-

test/utils/ansible-playbook_integration_runner/roles/ansible_test_deps/test/main.yml

@@ -26,4 +26,3 @@
         dest: "{{ git_dir }}"
     - name: Invoke ansible in hacking mode
       shell: "cd {{ git_dir }} && . hacking/env-setup && ansible --version && ansible-playbook --version"
-

test/utils/ansible-playbook_integration_runner/roles/run_integration/tasks/main.yml

@@ -1,6 +1,6 @@
 ---
 - name: Sync ansible repo to ec2 instance
-  synchronize: 
+  synchronize:
     src: "{{ sync_dir }}/"
     dest: "~/ansible"
   no_log: true