repos: remove trailing slash from layer path

In order for oe-core to correctly display the layers and revisions
used in a build, the paths used in conf/bblayers.conf must have no
trailing path separator.

Signed-off-by: Adrian Stratulat <adrian.stratulat91@gmail.com>
[Jan: fix overlong line, update test case]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

kas/repos.py

@@ -52,7 +52,8 @@ class Repo:
 
     def __getattr__(self, item):
         if item == 'layers':
-            return [os.path.join(self.path, layer) for layer in self._layers]
+            return [os.path.join(self.path, layer).rstrip(os.sep)
+                    for layer in self._layers]
         elif item == 'qualified_name':
             url = urlparse(self.url)
             return ('{url.netloc}{url.path}'