Definition of case_sensitive_modifier is changed in Rails 4.2

- We are passing table_attribute now so that Arel can calculate quoted
  node based on that.
- Commit - rails/rails@a38e957

Author: prathamesh-sonpatki

lib/arjdbc/mysql/adapter.rb

@@ -142,6 +142,11 @@ def case_sensitive_modifier(node)
       Arel::Nodes::Bin.new(node)
     end
 
+    def case_sensitive_modifier(node, table_attribute)
+      node = Arel::Nodes.build_quoted node, table_attribute
+      Arel::Nodes::Bin.new(node)
+    end if ActiveRecord::VERSION::STRING > '4.2'
+
     def limited_update_conditions(where_sql, quoted_table_name, quoted_primary_key)
       where_sql
     end