integration: Use vars_files in plays

It's unsightly and hard to maintain collections of references and long
lists across multiple playbooks/include files.  Centralize them all
in ``vars.yml``, then include that in all plays.

Minor: Update all files with a newline at the start and end.

Signed-off-by: Chris Evich <cevich@redhat.com>

contrib/test/integration/build/bats.yml

@@ -1,4 +1,5 @@
 ---
+
 - name: clone bats source repo
   git:
     repo: "https://github.com/sstephenson/bats.git"
@@ -14,4 +15,4 @@
   file:
     src: /usr/local/bin/bats
     dest: /usr/bin/bats
-    state: link
+    state: link

contrib/test/integration/build/cri-o.yml

@@ -1,4 +1,5 @@
 ---
+
 - name: stat the expected cri-o directory
   stat:
     path: "{{ ansible_env.GOPATH }}/src/github.com/kubernetes-incubator/cri-o"
@@ -75,4 +76,4 @@
     insertafter: 'storage_option = \['
     regexp: 'overlay2\.override_kernel_check=1'
     state: present
-  when: ansible_distribution == 'RedHat' or ansible_distribution == 'CentOS'
+  when: ansible_distribution == 'RedHat' or ansible_distribution == 'CentOS'

contrib/test/integration/build/cri-tools.yml

@@ -1,4 +1,5 @@
 ---
+
 - name: clone cri-tools source repo
   git:
     repo: "https://github.com/kubernetes-incubator/cri-tools.git"
@@ -12,4 +13,4 @@
   file:
     src: "{{ ansible_env.GOPATH }}/bin/crictl"
     dest: /usr/bin/crictl
-    state: link
+    state: link

contrib/test/integration/build/kubernetes.yml

@@ -1,4 +1,5 @@
 ---
+
 - name: clone kubernetes source repo
   git:
     repo: "https://github.com/runcom/kubernetes.git"
@@ -58,4 +59,4 @@
     dest: /etc/environment
     line: 'KUBECONFIG=/var/run/kubernetes/admin.kubeconfig'
     regexp: 'KUBECONFIG='
-    state: present
+    state: present

contrib/test/integration/build/plugins.yml

@@ -1,4 +1,5 @@
 ---
+
 - name: clone plugins source repo
   git:
     repo: "https://github.com/containernetworking/plugins.git"
@@ -46,4 +47,4 @@
     src: "{{ ansible_env.GOPATH }}/src/github.com/containernetworking/plugins/bin/bridge"
     dest: "/opt/cni/bin/bridge-custom"
     mode: "o=rwx,g=rx,o=rx"
-    remote_src: yes
+    remote_src: yes

contrib/test/integration/build/runc.yml

@@ -1,4 +1,5 @@
 ---
+
 - name: clone runc source repo
   git:
     repo: "https://github.com/opencontainers/runc.git"
@@ -18,4 +19,4 @@
   file:
     src: /usr/local/sbin/runc
     dest: /usr/bin/runc
-    state: link
+    state: link