systemvm: pylint conformance work in progress

I kept the changes at the minimum to make pylint happy,
I don't expect regressions.

Using default configuration:

> Your code has been rated at 8.92/10 (previous run: 7.81/10, +1.11)

* pylint 1.5.5,
* astroid 1.4.5
* Python 2.7.11 (default, Feb 22 2016, 09:22:43)
* [GCC 4.8.2]

Previous run is before the patch:

+-----------+--------+-------+----------+------------+
| type      | number |   %   | previous | difference |
+===========+========+=======+==========+============+
| code      |   3569 | 64.76 |     3582 |     -13.00 |
+-----------+--------+-------+----------+------------+
| docstring |    356 |  6.46 |      330 |     +26.00 |
+-----------+--------+-------+----------+------------+
| comment   |    773 | 14.03 |      788 |     -15.00 |
+-----------+--------+-------+----------+------------+
| empty     |    813 | 14.75 |      820 |      -7.00 |
+-----------+--------+-------+----------+------------+

+------------+--------+----------+------------+
| type       | number | previous | difference |
+============+========+==========+============+
| convention |    261 |      466 |      -205  |
+------------+--------+----------+------------+
| refactor   |     28 |       48 |       -20  |
+------------+--------+----------+------------+
| warning    |     43 |      185 |      -143  |
+------------+--------+----------+------------+
| error      |      4 |        5 |        -1  |
+------------+--------+----------+------------+

Author: Romain Dartigues

systemvm/patches/debian/config/opt/cloud/bin/baremetal-vr.py

@@ -15,8 +15,6 @@
 #specific language governing permissions and limitations
 #under the License.
 
-__author__ = 'frank'
-
 import subprocess
 import urllib
 import hmac
@@ -27,6 +25,8 @@
 
 from flask import Flask
 
+__author__ = 'frank'
+
 app = Flask(__name__)
 
 logger = logging.getLogger('baremetal-vr')