Set COG_STATIC_SCHEMA=1 in accept integration tests

Author: markphelps

integration-tests/tests/accept_mime_type.txtar

@@ -8,6 +8,8 @@
 # - Fields without accept do not have x-cog-accept
 # - Prediction still works end-to-end
 
+env COG_STATIC_SCHEMA=1
+
 cog build -t $TEST_IMAGE
 
 # Extract the schema from the image label

integration-tests/tests/accept_mime_type_error.txtar

@@ -3,6 +3,8 @@
 # The accept parameter is only valid on Path or File inputs. Using it on
 # str, int, float, etc. should produce a clear error at build time.
 
+env COG_STATIC_SCHEMA=1
+
 ! cog build -t $TEST_IMAGE
 stderr 'accept is only valid on Path or File inputs'