Compile warnings for non-unique GraphQL fragments

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Currently, when running a webpack compilation against our EE codebase, the following warnings appear:

Warning: fragment with name BaseEpic already exists.
graphql-tag enforces all fragment names across your application to be unique; read more about
this in the docs: http://dev.apollodata.com/core/fragments.html#unique-names
Warning: fragment with name Project already exists.
graphql-tag enforces all fragment names across your application to be unique; read more about
this in the docs: http://dev.apollodata.com/core/fragments.html#unique-names

We ought to resolve these similar to the way this was handled in #13330 (closed) and !15020 (merged)