Reverse dependencies for s3etag

Latest version of the following gems require s3etag

Gem	Version	Date	Downloads
manifest-builder +102 Thousand Downloads	`0.7.5` August 19, 2015	August 19, 2015	102 Thousand
s3poller +45.2 Thousand Downloads	`0.1.7` November 21, 2017	November 21, 2017	45.2 Thousand
chefrepo-manifest-builder +41.2 Thousand Downloads	`0.2.4` May 12, 2015	May 12, 2015	41.2 Thousand
environments-list-builder +22.3 Thousand Downloads	`0.3.4` May 12, 2015	May 12, 2015	22.3 Thousand