run pylint3 and fixed report

This commit adds a pylint configuration and fixed all found issues.

Signed-off-by: Claudius Heine <ch@denx.de>

kas/repos.py

@@ -19,6 +19,9 @@
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
+"""
+    This module contains the Repo class.
+"""
 
 import os
 from urllib.parse import urlparse
@@ -28,6 +31,10 @@ __copyright__ = 'Copyright (c) Siemens AG, 2017'
 
 
 class Repo:
+    """
+        Represents a repository in the kas configuration.
+    """
+
     def __init__(self, url, path, refspec=None, sublayers=None):
         self.url = url
         self.path = path
@@ -37,6 +44,9 @@ class Repo:
         self.git_operation_disabled = False
 
     def disable_git_operations(self):
+        """
+            Disabled all git operation for this repository.
+        """
         self.git_operation_disabled = True
 
     def __getattr__(self, item):
@@ -47,11 +57,12 @@ class Repo:
                 return [self.path + '/' + l for l in self.sublayers]
         elif item == 'qualified_name':
             url = urlparse(self.url)
-            return ('{url.netloc}{url.path}'.format(url=url)
-                                            .replace('@', '.')
-                                            .replace(':', '.')
-                                            .replace('/', '.')
-                                            .replace('*', '.'))
+            return ('{url.netloc}{url.path}'
+                    .format(url=url)
+                    .replace('@', '.')
+                    .replace(':', '.')
+                    .replace('/', '.')
+                    .replace('*', '.'))
 
     def __str__(self):
         return '%s:%s %s' % (self.url, self.refspec, self.sublayers)