Increase ETag cache expiry time
Increase ETag cache expiry time

As discussed in #29777.

axilleas/gitlabhq,dreampet/gitlab,dplarson/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,htve/GitlabForChinese,htve/GitlabForChinese,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,dplarson/gitlabhq,stoplightio/gitlabhq,htve/GitlabForChinese,t-zuehlsdorff/gitlabhq,jirutka/gitlabhq,axilleas/gitlabhq,htve/GitlabForChinese,stoplightio/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,dplarson/gitlabhq,darkrasid/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,axilleas/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,iiet/iiet-git,darkrasid/gitlabhq,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,jirutka/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,dreampet/gitlab,darkrasid/gitlabhq