Move more stuff to common

integration_test.go

@@ -29,13 +29,6 @@ import (
 	"tailscale.com/ipn/ipnstate"
 )
 
-var tailscaleVersions = []string{"1.20.4", "1.18.2", "1.16.2", "1.14.3", "1.12.3"}
-
-type TestNamespace struct {
-	count      int
-	tailscales map[string]dockertest.Resource
-}
-
 type IntegrationTestSuite struct {
 	suite.Suite
 	stats *suite.SuiteInformation