Adding Route table (#6)

Issue #, if available: [#489](aws-controllers-k8s/community#489)

Description of changes:
* adds route table resource
* refactors e2e tests to share common resources (i.e. VPC)
  * otherwise, vpcs would need to be created for each test which is inefficient and may exceed quota
  * now, only 2 vpcs are created per test run
  * could not use `@pytest.fixture(scope="session")` on vpc because we use [pytest-xdist](pytest-dev/pytest-xdist#271)
* adds route table tests

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

apis/v1alpha1/ack-generate-metadata.yaml

@@ -1,14 +1,14 @@
 ack_generate_info:
-  build_date: "2021-09-01T18:32:41Z"
-  build_hash: 6f22b7b568e25b4ee007bb1ab5f9338c16daf172
+  build_date: "2021-09-02T21:26:56Z"
+  build_hash: d20cb4f8170e3bae0af2783f1cccbcd98c868b52
   go_version: go1.17 darwin/amd64
   version: v0.13.0
-api_directory_checksum: ae8b61e0359ce7d3f8795b243537b07c43e2609e
+api_directory_checksum: 5c310ddd87ebed17d437af5c8a17cad97d2fd083
 api_version: v1alpha1
 aws_sdk_go_version: v1.37.10
 generator_config_info:
-  file_checksum: d37d8e26f07ea82e6ce896adffc138034078c1e1
+  file_checksum: 61ae549a230a8641ecc9edec1eec8c0bcde87b83
   original_file_name: generator.yaml
 last_modification:
   reason: API generation
-  timestamp: 2021-09-01 18:32:53.713542 +0000 UTC
+  timestamp: 2021-09-02 21:27:04.884645 +0000 UTC

apis/v1alpha1/generator.yaml

@@ -2,6 +2,7 @@ ignore:
   field_paths:
     - CreateVpcInput.DryRun
     - CreateSubnetInput.DryRun
+    - CreateRouteTableInput.DryRun
   resource_names:
     - AccountAttribute
     - CapacityReservation
@@ -32,7 +33,7 @@ ignore:
     - NetworkInterface
     - PlacementGroup
     - ReservedInstancesListing
-    - RouteTable
+    #- RouteTable
     - Route
     - SecurityGroup
     - Snapshot
@@ -64,6 +65,11 @@ ignore:
 
 resources:
   Subnet:
+    exceptions:
+      terminal_codes:
+        - InvalidVpcID.Malformed
+        - InvalidVpcID.NotFound
+  RouteTable:
     exceptions:
       terminal_codes:
         - InvalidVpcID.Malformed