bitbake: Fix -e when used with -b option

When using the -e and -b options together an expection was occuring.
This was due to incorrect initialisation and this patch adds in the
correct initialisation calls.

(Bitbake rev: e7ade6dcd646b478df79f968934a0edcb63254f7)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -276,6 +276,12 @@ class BBCooker:
         envdata = None
 
         if buildfile:
+            # Parse the configuration here. We need to do it explicitly here since
+            # this showEnvironment() code path doesn't use the cache
+            self.parseConfiguration()
+            self.status = bb.cache.CacheData(self.caches_array)
+            self.handleCollections( bb.data.getVar("BBFILE_COLLECTIONS", self.configuration.data, 1) )
+
             fn = self.matchFile(buildfile)
         elif len(pkgs_to_build) == 1:
             self.updateCache()