Gradle plugin fails randomly

[patrickpichler]

Hi,

I'm experiencing a strange issue. For some reason the resolve task fails for some people but
not for others.

We narrowed the issue down that it has to be somehow classpath ordering related, as we have
two conflicting versions of swagger-core in our classpath. This is an issue of its own but we
never noticed, as the build never failed.

I guess the reason we experiencing this, is that the resolve task uses an Set to filter out
duplicated urls here.
As this set then gets transformed to an array the ordering is not stable. Which means that
for some of my colleagues the wrong version is earlier in the resulting url classpath causing
the build to fail.

[patrickpichler]

This is fixed by #3877

[frantuma]

Thanks for reporting and providing the fix! merged #3877