Force imagePullPolicy to Always

Right now it's defaults to Always if :latest tag is
specified, or IfNotPresent otherwise. Which very confusing,
especialy if you switch from :latest to some tag and wonder
why your images are not updated.

Change-Id: I2cdc0817c2b4e8c95993b5eae44ffff26acd7662

fuel_ccp/templates.py

@@ -119,6 +119,7 @@ def serialize_daemon_container_spec(container):
     cont_spec = {
         "name": container["name"],
         "image": images.image_spec(container["image"]),
+        "imagePullPolicy": "Always",
         "command": _get_start_cmd(container["name"]),
         "volumeMounts": serialize_volume_mounts(container),
         "readinessProbe": {

fuel_ccp/tests/test_templates.py

@@ -8,6 +8,7 @@ class TestDeploy(base.TestCase):
         container = {
             "name": "name_foo",
             "image": "image_foo",
+            "imagePullPolicy": "Always",
             "command": "command_foo",
             "cm_version": 1,
             "env": [{
@@ -29,6 +30,7 @@ class TestDeploy(base.TestCase):
         expected = {
             "name": "name_foo",
             "image": "ccp/image_foo:latest",
+            "imagePullPolicy": "Always",
             "command": [
                 "dumb-init",
                 "/usr/bin/python",