Ensure correct support for UUID names despite name length restriction

[iramiller]

Summary

Ensure proper support for names in name service based on UUID. See x/name/keeper/keeper_test.go#46

Problem Definition

The name service has a special exemption for uuid based names that bypasses the length restriction. Ensure this capability is maintained, restore the unit test in normalizeName and remove the existing TODO statement.

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[iramiller]

We should also consider making the default value for number of segments allowed something shorter like 5 or 6 because if these were all or mostly based on uuids then the fully qualified name string would become excessively long. In any case a test should be added that makes every name segment allowed up to some sort of limit a uuid to verify correct operation and behavior.