Pip is required for vault #3376 (#3378)

* Change execution order for pip

* Remove spaces

roles/bootstrap-os/tasks/bootstrap-centos.yml

@@ -16,5 +16,14 @@
 
 - name: Install packages requirements for bootstrap
   yum:
-    name: libselinux-python
+    name: "{{ packages }}"
+    state: present
+  vars:
+    packages:
+      - libselinux-python
+      - epel-release
+
+- name: Install pip for bootstrap
+  yum:
+    name: python-pip
     state: present