bitbake: toaster: Fix oe-core fixture

Due to a copy paste error we managed to get some of the wrong
information in the oe fixture that provides a suggested default settings
for Toaster. This meant it tested correctly when it shouldn't have.
Fix:
 - The use of local bitbake
 - An incorrect call to realpath which didn't include its parent module.
 - The field used for the local_dir of an existing openembedded-core

(Bitbake rev: d57a9124650e5367919668dfccf6aad4962a77f1)

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/bldcontrol/localhostbecontroller.py

@@ -98,8 +98,12 @@ class LocalhostBEController(BuildEnvironmentController):
         # 1. get a list of repos with branches, and map dirpaths for each layer
         gitrepos = {}
 
-        gitrepos[(bitbake.giturl, bitbake.commit)] = []
-        gitrepos[(bitbake.giturl, bitbake.commit)].append( ("bitbake", bitbake.dirpath) )
+        # if we're using a remotely fetched version of bitbake add its git
+        # details to the list of repos to clone
+        if bitbake.giturl and bitbake.commit:
+            gitrepos[(bitbake.giturl, bitbake.commit)] = []
+            gitrepos[(bitbake.giturl, bitbake.commit)].append(
+                ("bitbake", bitbake.dirpath))
 
         for layer in layers:
             # We don't need to git clone the layer for the CustomImageRecipe
@@ -142,8 +146,6 @@ class LocalhostBEController(BuildEnvironmentController):
 
         logger.info("Using pre-checked out source for layer %s", cached_layers)
 
-
-
         # 3. checkout the repositories
         for giturl, commit in gitrepos.keys():
             localdirname = os.path.join(self.be.sourcedir, self.getGitCloneDirectory(giturl, commit))