Use compatible versions for requirements

This patch changes the version specification for
the requirements to ones that are compliant with
Juno release of OpenStack.

Partial-bug: #1439089
Change-Id: Id06ba598df6babe0b5ffcf0a7b08049dbbeaf429

requirements.txt

@@ -1,7 +1,7 @@
 argparse==1.2.1
-cliff>=1.9.0
+cliff>=1.7.0,<=1.9.0
 pbr>=0.6,!=0.7,<1.0
-python-keystoneclient>=0.7.1,<=0.7.2
-PyYAML==3.10
-requests>=1.2.3
-six>=1.5.2
+python-keystoneclient>=0.10.0,<=1.1.0
+PyYAML>=3.1.0,<=3.10
+requests>=2.1.0,!=2.4.0,<=2.2.1
+six>=1.7.0,<=1.9.0

test-requirements.txt

@@ -1,6 +1,6 @@
 hacking==0.7
-mock==1.0
-nose==1.1.2
+mock>=1.0
+nose<=1.3.1
 nose2==0.4.1
 nose-timer==0.2.0
 pyprof2calltree==1.3.2