Fix remove_index issue when provided :name is a symbol

Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -404,7 +404,7 @@ def index_name(table_name, options) #:nodoc:
       # as there's no way to determine the correct answer in that case.
       def index_name_exists?(table_name, index_name, default)
         return default unless respond_to?(:indexes)
-        indexes(table_name).detect { |i| i.name == index_name }
+        indexes(table_name).detect { |i| i.name == index_name.to_s }
       end
 
       # Returns a string of <tt>CREATE TABLE</tt> SQL statement(s) for recreating the

activerecord/test/cases/migration_test.rb

@@ -91,7 +91,7 @@ def test_add_index
         # Oracle adapter is shortening index name when just column list is given
         unless current_adapter?(:OracleAdapter)
           assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"]) }
-          assert_nothing_raised { Person.connection.remove_index("people", :name => "index_people_on_last_name_and_first_name") }
+          assert_nothing_raised { Person.connection.remove_index("people", :name => :index_people_on_last_name_and_first_name) }
           assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"]) }
           assert_nothing_raised { Person.connection.remove_index("people", "last_name_and_first_name") }
         end