fixup! generate.password: Strip new lines from the password file

Strip earlier, as stripping so late leads to correct self.passwd
but incorrect passwd, thus 3rd party applications storing passwords
with additional newlines are still resulting in bad passwords.

/reviewed-on nexedi/slapos!366

slapos/recipe/random.py

@@ -134,14 +134,14 @@ class Password(object):
     if self.storage_path:
       try:
         with open(self.storage_path) as f:
-          passwd = f.read()
+          passwd = f.read().strip('\n')
       except IOError as e:
         if e.errno != errno.ENOENT:
           raise
     if not passwd:
       passwd = self.generatePassword(int(options.get('bytes', '8')))
       self.update = self.install
-    self.passwd = passwd.strip('\n')
+    self.passwd = passwd
     # Password must not go into .installed file, for 2 reasons:
     # security of course but also to prevent buildout to always reinstall.
     def get(option, *args, **kw):