Sort items in requirement related files

Update two requirement related files with command: sort-i {filename}.
This make these files more readable, can find the libraries easily.

Change-Id: I5969ef37d02814bf2c09761f133464c5a02f0d6b

requirements.txt

@@ -1,9 +1,9 @@
-pbr>=0.5.21,<1.0
 argparse
+Babel>=1.3
 iso8601>=0.1.8
+netaddr>=0.7.6
+oslo.config>=1.2.0
+pbr>=0.5.21,<1.0
 PrettyTable>=0.7,<0.8
 requests>=1.1
 six>=1.4.1
-oslo.config>=1.2.0
-netaddr>=0.7.6
-Babel>=1.3

test-requirements.txt

@@ -1,7 +1,7 @@
-hacking>=0.8.0,<0.9
 coverage>=3.6
 discover
 fixtures>=0.3.14
+hacking>=0.8.0,<0.9
 httpretty>=0.7.1
 keyring>=1.6.1,<2.0
 mock>=1.0