Require rubygems for the core_extensions specs
Require rubygems for the core_extensions specs

These specs require some pg_* extensions that require json, and on
1.8 json is not in stdlib and needs rubygems loaded.

beni55/sequel,offshore-safety/sequel,dennis-d/custom_sequel,davidbegin/sequel,yazshel/sequel,freshpay/sequel,knut2/sequel,seeARMS/sequel,nju520/sequel,mpalmer/sequel,knut2/sequel,mpalmer/sequel,seeARMS/sequel,pfarrell/sequel,beni55/sequel,nicohvi/sequel,uhoh-itsmaciek/sequel,offshore-safety/sequel,gferguson-gd/sequel,reubano/sequel,dennis-d/custom_sequel,reubano/sequel,chef/sequel,nju520/sequel,t-morgan/sequel,offshore-safety/sequel,yazshel/sequel,pfarrell/sequel,freshpay/sequel,uhoh-itsmaciek/sequel,nicohvi/sequel,t-morgan/sequel,davidbegin/sequel,bigfix/sequel,gferguson-gd/sequel,Marketcircle/sequel