Fix merge issues with RailsSequels rename

app/models/table/user_table.rb

@@ -382,6 +382,6 @@ class UserTable < Sequel::Model
   end
 
   def relator
-    @relator ||= CartoDB::TableRelator.new(Rails::Sequel.connection, self)
+    @relator ||= CartoDB::TableRelator.new(SequelRails.connection, self)
   end
 end

spec/models/table_spec.rb

@@ -551,7 +551,7 @@ describe Table do
 
         table = create_table(name: 'Wadus table', user_id: @user.id)
 
-        Rails::Sequel.connection.table_exists?(table.name.to_sym).should be_false
+        SequelRails.connection.table_exists?(table.name.to_sym).should be_false
         @user.in_database do |user_database|
           user_database.table_exists?(table.name.to_sym).should be_true
         end
@@ -582,7 +582,7 @@ describe Table do
         table = create_table({:name => 'Wadus table', :user_id => @user.id})
         table.name.should == 'wadus_table'
 
-        Rails::Sequel.connection.table_exists?(table.name.to_sym).should be_false
+        SequelRails.connection.table_exists?(table.name.to_sym).should be_false
         @user.in_database do |user_database|
           user_database.table_exists?(table.name.to_sym).should be_true
         end

zeus_plan.rb

@@ -67,7 +67,7 @@ class CustomPlan < Zeus::Rails
   end
 
   def rake
-    Rails::Sequel.connection.disconnect
+    SequelRails.connection.disconnect
     super
   end
 end