Move oslotest to test-only requires

oslotest is / should not be needed during runtime,
only during testing.

Change-Id: I72f0a82c036aac46fbb819e50122596a323df00c

requirements-py3.txt

@@ -9,7 +9,6 @@ kombu>=2.4.8
 lockfile>=0.8
 netaddr>=0.7.6
 oslo.config>=1.2.0
-oslotest
 PasteDeploy>=1.5.0
 pbr>=0.6,!=0.7,<1.0
 posix_ipc

requirements.txt

@@ -11,7 +11,6 @@ kombu>=2.4.8
 lockfile>=0.8
 netaddr>=0.7.6
 oslo.config>=1.2.0
-oslotest
 PasteDeploy>=1.5.0
 posix_ipc
 PrettyTable>=0.7,<0.8

test-requirements-py3.txt

@@ -4,6 +4,7 @@ fixtures>=0.3.14
 hacking>=0.8.0,<0.9
 mock>=1.0
 mox3>=0.7.0
+oslotest
 pyzmq==2.2.0.1
 redis
 simplejson>=2.0.9

test-requirements.txt

@@ -5,6 +5,7 @@ hacking>=0.8.0,<0.9
 mock>=1.0
 mox>=0.5.3
 MySQL-python
+oslotest
 pylint==0.25.2
 pyzmq==2.2.0.1
 redis