Downgrade requirements for Sprut project

Author: Evgenii Frolov

requirements.txt

@@ -1,9 +1,9 @@
-pbr==5.1.1
-webob==1.8.4
-six==1.12.0
-SQLAlchemy==1.0.13
-requests==2.20.0
+pbr==1.8.1
+webob==1.6.1
+six==1.10.0
+SQLAlchemy==1.0.11
+requests==2.6.0
 mysql-connector==2.1.3
-oslo.config==6.7.0
--e git+https://github.com/phantomii/bazooka.git@0.0.3#egg=bazooka
--e git+https://github.com/phantomii/pyretries.git@0.0.3#egg=pyretries
+oslo.config==3.22.0
+-e git+https://github.com/phantomii/bazooka.git@centos-req#egg=bazooka
+-e git+https://github.com/phantomii/pyretries.git@centos-req#egg=pyretries