Use docker cli instead of Docker Hub v1 API

Docker Hub v1 API has been removed. See https://www.docker.com/blog/docker-hub-v1-api-deprecation/

Test Plan:

```
$ python3 test.py Test.test_should_run
.
----------------------------------------------------------------------
Ran 1 test in 10.634s

OK
```

Author: Atry

aws/hhvm1/lambdas/activities.py

@@ -9,7 +9,7 @@
 from urllib import request
 
 import common
-
+import subprocess
 
 class Activity:
   # Subclasses must override these.
@@ -228,20 +228,18 @@ class PublishDockerImages(Activity):
   def task_env(self):
     return {'DOCKER_ONLY': '1'}
 
-  def docker_tags(self, repo):
-    return {
-      tag['name'] for tag in json.loads(
-        request
-          .urlopen(f'https://index.docker.io/v1/repositories/hhvm/{repo}/tags')
-          .read()
-          .decode('ascii')
-      )
-    }
+  def is_docker_tag_absent(self, repo):
+    docker_subprocess = subprocess.run(('docker', 'manifest', 'inspect', f'hhvm/hhvm:{self.version()}'), capture_output=True)
+    if docker_subprocess.returncode == 1 and docker_subprocess.stderr.startswith(b'no such manifest'):
+      return True
+    else:
+      docker_subprocess.check_returncode()
+      return False
 
   def should_run(self):
     return (
-      self.version() not in self.docker_tags('hhvm') or
-      self.version() not in self.docker_tags('hhvm-proxygen')
+      self.is_docker_tag_absent('hhvm') or
+      self.is_docker_tag_absent('hhvm-proxygen')
     )
 
 

aws/hhvm1/lambdas/test.py

@@ -286,7 +286,7 @@ def test_ec2_params(self):
     )
 
   def test_should_run(self):
-    past = (date.today() - timedelta(days=2)).strftime('%Y.%m.%d')
+    past = (date.today() - timedelta(days=42)).strftime('%Y.%m.%d')
     future = (date.today() + timedelta(days=2)).strftime('%Y.%m.%d')
 
     self.assertEqual(