Updated the config sample file generation command

Following the update of the project requirements, we should now
use the oslo.config namespace of oslo.log when generating ou
Watcher config sample file.

Change-Id: I7a1f3d555534b40c041b7f042f19fae231b7e80c
Closes-Bug: #1518297

requirements.txt

@@ -2,30 +2,33 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=1.6
-PasteDeploy>=1.5.0
+enum34;python_version=='2.7' or python_version=='2.6'
+jsonpatch>=1.1
+keystonemiddleware>=2.0.0,!=2.4.0
 oslo.config>=2.3.0  # Apache-2.0
 oslo.db>=2.4.1      # Apache-2.0
 oslo.i18n>=1.5.0    # Apache-2.0
 oslo.log>=1.8.0     # Apache-2.0
 oslo.messaging>=1.16.0,!=1.17.0,!=1.17.1,!=2.6.0,!=2.6.1 # Apache-2.0
+oslo.policy>=0.5.0  # Apache-2.0
 oslo.service>=0.7.0 # Apache-2.0
 oslo.utils>=2.0.0,!=2.6.0  # Apache-2.0
+PasteDeploy>=1.5.0
+pbr>=1.6
 pecan>=1.0.0
-keystonemiddleware>=2.0.0,!=2.4.0
+
+# Collector
+python-ceilometerclient>=1.5.0
+
+# -- watcher Applier
+python-cinderclient>=1.3.1
+python-glanceclient>=0.18.0
+python-neutronclient>=2.6.0
+python-novaclient>=2.28.1,!=2.33.0
+python-openstackclient>=1.5.0
+# --
+
 six>=1.9.0
 SQLAlchemy>=0.9.9,<1.1.0
 stevedore>=1.5.0    # Apache-2.0
 WSME>=0.7
-jsonpatch>=1.1
-enum34;python_version=='2.7' or python_version=='2.6'
-
-# watcher Applier
-python-novaclient>=2.28.1,!=2.33.0
-python-openstackclient>=1.5.0
-python-neutronclient>=2.6.0
-python-glanceclient>=0.18.0
-python-cinderclient>=1.3.1
-
-# Collector
-python-ceilometerclient>=1.5.0