Ruby: Fix bad join-order in `resolveConstant`
Ruby: Fix bad join-order in `resolveConstant`

```
[2021-11-09 11:35:47] (99s) Starting to evaluate predicate Module::Cached::resolveConstant#ff#antijoin_rhs/3@f6dcd6
[2021-11-09 11:35:58] (111s) Tuple counts for Module::Cached::resolveConstant#ff#antijoin_rhs/3@f6dcd6 after 11.5s:
                      165960683 ~0%     {4} r1 = JOIN Module::Cached::resolveConstant#ff#shared WITH Module::constantDefinition0#ff_10#join_rhs ON FIRST 1 OUTPUT Rhs.1, Lhs.1 'arg1', Lhs.0 'arg0', Lhs.2 'arg2'

                      0         ~0%     {3} r2 = JOIN r1 WITH Module::ClassDeclaration::getSuperclassExpr_dispred#ff ON FIRST 2 OUTPUT Lhs.2 'arg0', Lhs.1 'arg1', Lhs.3 'arg2'

                      0         ~0%     {3} r3 = JOIN r1 WITH Constant::ConstantAccess::getScopeExpr_dispred#ff ON FIRST 2 OUTPUT Lhs.2 'arg0', Lhs.1 'arg1', Lhs.3 'arg2'

                      0         ~0%     {3} r4 = r2 UNION r3
                                        return r4
```

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