Suppress RuboCop's warning and offense

This PR suppresses the following RuboCop's warning and offense:

```console
$ bundle exec rake
(snip)

Warning: Using `Naming/PredicateName` configuration in /Users/koic/src/github.com/rubocop/rubocop-performance/.rubocop.yml for `Naming/PredicatePrefix`.

(snip)

Offenses:

lib/rubocop/cop/performance/inefficient_hash_search.rb:86:13: C: Naming/PredicateMethod: Predicate method names should end with ?.
        def use_long_method
            ^^^^^^^^^^^^^^^

122 files inspected, 1 offense detected
```

Author: koic

.rubocop.yml

@@ -41,7 +41,7 @@ Naming/InclusiveLanguage:
       Suggestions:
         - offense
 
-Naming/PredicateName:
+Naming/PredicatePrefix:
   # Method define macros for dynamically generated method.
   MethodDefinitionMacros:
     - define_method

lib/rubocop/cop/performance/inefficient_hash_search.rb

@@ -74,16 +74,16 @@ def replacement(node)
 
         def correct_method(node)
           case current_method(node)
-          when :keys then use_long_method ? 'has_key?' : 'key?'
-          when :values then use_long_method ? 'has_value?' : 'value?'
+          when :keys then use_long_method? ? 'has_key?' : 'key?'
+          when :values then use_long_method? ? 'has_value?' : 'value?'
           end
         end
 
         def current_method(node)
           node.receiver.method_name
         end
 
-        def use_long_method
+        def use_long_method?
           config.for_enabled_cop('Style/PreferredHashMethods')['EnforcedStyle'] == 'long'
         end