Revert "TT#22351 Fix ca76144c4a: API test trustedsources is also failing in stretch Docker image"

This reverts commit 5988b51589.

The tests are fixed now, re-enable them on Jenkins using 'stable' set.

Change-Id: Ide5735bf42090c8176a4e20ecf538fcf2a698b60

t/api-rest/testrunner

@@ -25,7 +25,7 @@ fi
 
 if [ "${SELECT}" = "stable" ] ; then
   echo "Test selection: ${SELECT}"
-  SELECT=$(echo t/api-rest/api-{all-links,bannedips,bannedusers,billingnetworks,billingprofiles,billingzones,calllists,calls,cert-auth,contracts,customercontacts,customers,lnp,ncoslevels,pbxdevicemodels,peeringgroups,profilepackages,resellers,rewriterules,rewriterulesets,root,soundsets,systemcontacts,threads,topuplogs,valid-patch,vouchers,method-override}.t)
+  SELECT=$(echo t/api-rest/api-{all-links,bannedips,bannedusers,billingnetworks,billingprofiles,billingzones,calllists,calls,cert-auth,contracts,customercontacts,customers,lnp,ncoslevels,pbxdevicemodels,peeringgroups,profilepackages,resellers,rewriterules,rewriterulesets,root,soundsets,systemcontacts,threads,topuplogs,trustedsources,valid-patch,vouchers,method-override}.t)
 elif [ "${SELECT}" = "fast" ] ; then
   echo "Test selection: ${SELECT}"
   SELECT=$(echo t/api-rest/api-{bannedips,bannedusers,billingnetworks,billingzones,calls,cert-auth,cfdestinationsets,ncoslevels,peeringgroups,peeringrules,peeringinboundrules,peeringservers,resellers,rewriterules,root,soundsets,systemcontacts,valid-patch,vouchers,method-override}.t)