Require at least 1GB in /usr/bin/local and tempdir

During install, those paths are used and require some free space.

roles/openshift_health_checker/openshift_checks/disk_availability.py

@@ -1,5 +1,6 @@
 # pylint: disable=missing-docstring
 import os.path
+import tempfile
 
 from openshift_checks import OpenShiftCheck, OpenShiftCheckException, get_var
 from openshift_checks.mixins import NotContainerizedMixin
@@ -19,6 +20,19 @@ class DiskAvailability(NotContainerizedMixin, OpenShiftCheck):
             'nodes': 15 * 10**9,
             'etcd': 20 * 10**9,
         },
+        # Used to copy client binaries into,
+        # see roles/openshift_cli/library/openshift_container_binary_sync.py.
+        '/usr/local/bin': {
+            'masters': 1 * 10**9,
+            'nodes': 1 * 10**9,
+            'etcd': 1 * 10**9,
+        },
+        # Used as temporary storage in several cases.
+        tempfile.gettempdir(): {
+            'masters': 1 * 10**9,
+            'nodes': 1 * 10**9,
+            'etcd': 1 * 10**9,
+        },
     }
 
     @classmethod

roles/openshift_health_checker/test/disk_availability_test.py

@@ -81,7 +81,7 @@ def test_cannot_determine_available_disk(ansible_mounts, extra_words):
         [{
             # not enough space on / ...
             'mount': '/',
-            'size_available': 0,
+            'size_available': 2 * 10**9,
         }, {
             # ... but enough on /var
             'mount': '/var',