Add spec for limit/offset in a subselect
Add spec for limit/offset in a subselect

The current offset emulation with row number does not handle
subselects, so this spec currently fails.

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