Integrate pre-commit

Just as we've done for Nova and many other projects.

Change-Id: I40410f637fcb1b05724a4ed7106e557c07006164
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

.pre-commit-config.yaml

@@ -0,0 +1,41 @@
+---
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.6.0
+    hooks:
+      - id: trailing-whitespace
+      - id: mixed-line-ending
+        args: ['--fix', 'lf']
+        exclude: '.*\.(svg)$'
+      - id: check-byte-order-marker
+      - id: check-executables-have-shebangs
+      - id: check-merge-conflict
+      - id: debug-statements
+      - id: check-json
+        files: .*\.json$
+      - id: check-yaml
+        files: .*\.(yaml|yml)$
+  - repo: https://github.com/Lucas-C/pre-commit-hooks
+    rev: v1.5.5
+    hooks:
+      - id: remove-tabs
+        exclude: '.*\.(svg)$'
+  - repo: https://opendev.org/openstack/hacking
+    rev: 6.1.0
+    hooks:
+      - id: hacking
+        additional_dependencies: []
+        exclude: '^(doc|releasenotes|tools)/.*$'
+  # TODO(stephenfin): Uncomment this
+  # - repo: https://github.com/hhatto/autopep8
+  #   rev: v2.3.1
+  #   hooks:
+  #     - id: autopep8
+  #       files: '^.*\.py$'
+  # - repo: https://github.com/sphinx-contrib/sphinx-lint
+  #   rev: v0.9.1
+  #   hooks:
+  #     - id: sphinx-lint
+  #       args: [--enable=default-role]
+  #       files: ^doc/|releasenotes|api-guide
+  #       types: [rst]

placement/tests/functional/gabbits/allocation-candidates-member-of.yaml

@@ -107,7 +107,6 @@ tests:
   status: 200
   response_json_paths:
       $.allocation_requests.`len`: 2
-  status: 200
 
 - name: verify microversion fail for multiple member_of params
   GET: /allocation_candidates?resources=VCPU:1,MEMORY_MB:1024,DISK_GB:100&member_of=$ENVIRON['AGGA_UUID']&member_of=$ENVIRON['AGGB_UUID']

placement/tests/functional/gabbits/microversion.yaml

@@ -32,10 +32,6 @@ tests:
   status: 406
   response_headers:
       content-type: /application/json/
-  response_json_paths:
-      $.errors.[0].title: Not Acceptable
-      $.errors.[0].max_version: /^\d+\.\d+$/
-      $.errors.[0].min_version: /^\d+\.\d+$/
   response_strings:
       - "Unacceptable version header: 0.5"
   response_json_paths:

tox.ini

@@ -36,8 +36,11 @@ commands =
 [testenv:pep8]
 description =
   Run style checks.
+skip_install = true
+deps =
+    pre-commit
 commands =
-  bash tools/flake8wrap.sh {posargs}
+    pre-commit run --all-files --show-diff-on-failure
 
 [testenv:fast8]
 description =