Update RuboCop configuration to inherit from theforeman-rubocop (#886)

* Update RuboCop configuration to inherit from theforeman-rubocop

.github/workflows/ruby_tests.yml

@@ -14,6 +14,8 @@ jobs:
   rubocop:
     name: Rubocop
     uses: theforeman/actions/.github/workflows/rubocop.yml@v0
+    with:
+      command: bundle exec rubocop --parallel --format github
 
   test:
     name: Ruby

.rubocop.yml

@@ -1,2 +1,73 @@
-inherit_from:
-  - https://raw.githubusercontent.com/theforeman/foreman/2.3-stable/.rubocop.yml
+inherit_from: .rubocop_todo.yml
+
+inherit_gem:
+  theforeman-rubocop:
+    - default.yml
+
+AllCops:
+  TargetRubyVersion: 2.7
+  TargetRailsVersion: 6.1
+  Exclude:
+    - "db/schema.rb"
+    - "node_modules/**/*"
+    - "vendor/**/*"
+
+Metrics:
+  Enabled: false
+
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+Layout/LineLength:
+  Enabled: false
+
+Layout/DotPosition:
+  Enabled: false
+
+Layout/HashAlignment:
+  Enabled: false
+
+Performance/RegexpMatch:
+  Enabled: false
+
+Rails/RefuteMethods:
+  Enabled: false
+
+# Don't prefer is_a? over kind_of?
+Style/ClassCheck:
+  Enabled: false
+
+Style/ConditionalAssignment:
+  Enabled: false
+
+# Support both, Ruby 1.9 hashmap and hash-rocket syntax
+Style/HashSyntax:
+  EnforcedStyle: no_mixed_keys
+
+Style/IfUnlessModifier:
+  Enabled: false
+
+# disabled until we can configure "+" as concat sign
+Style/LineEndConcatenation:
+  Enabled: false
+
+Style/NumericPredicate:
+  Enabled: false
+
+Style/ParenthesesAroundCondition:
+  Enabled: false
+
+# Both double and single quotes are OK
+Style/StringLiterals:
+  Enabled: false
+
+Style/SymbolArray:
+  EnforcedStyle: brackets
+  MinSize: 1
+
+#Allow both ['a', 'b'], %w[a b] and %w(a b) style arrays
+Style/WordArray:
+  Enabled: false
+
+Style/RaiseArgs:
+  EnforcedStyle: compact