Handle old 'EU' location constraint for the eu-west-1 region#4

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pdecat wants to merge 1 commit intoEverythingMe:masterfrom

Commits on Oct 21, 2015

Handle old 'EU' location constraint for the eu-west-1 region (cf. http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region)
pdecat
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