testing: add "series" argument to Repo methods.

worker/uniter/uniter_test.go

 package uniter_test
 
 import (
         "bytes"
         "crypto/sha256"
         "encoding/hex"
         "fmt"
         "io"
         "io/ioutil"
         . "launchpad.net/gocheck"
@@ skipping 278 matching lines @@
         c.Logf("%#v", s)
         s.step(c, ctx)
 }
 
 type createCharm struct {
         revision int
         badHooks []string
 }
 
 func (s createCharm) step(c *C, ctx *context) {
-        base := coretesting.Charms.ClonedDirPath(c.MkDir(), "dummy")
+        base := coretesting.Charms.ClonedDirPath(c.MkDir(), "series", "dummy")
         for _, name := range []string{"install", "start", "config-changed", "upgrade-charm"} {
                 path := filepath.Join(base, "hooks", name)
                 good := true
                 for _, bad := range s.badHooks {
                         if name == bad {
                                 good = false
                         }
                 }
                 ctx.writeHook(c, path, good)
         }
@@ skipping 334 matching lines @@
         f func(*C, *context)
 }
 
 func (s custom) step(c *C, ctx *context) {
         s.f(c, ctx)
 }
 
 func curl(revision int) *charm.URL {
         return charm.MustParseURL("cs:series/dummy").WithRevision(revision)
 }