Move tempest runtime dependencies to the pip-requires

Tempest is a test tool.

We should consider all runtime dependency as regular dependency and
they should be in the pip-requires.

The dependencies required just for testing tempest itself should be only in the
test-requires.

Fixing bug #1090020

Change-Id: I4107bf79dd4fa6d6902b4d0e6bfc795f1eb5b787
diff --git a/tools/pip-requires b/tools/pip-requires
index e85cced..758442c 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -14,3 +14,6 @@
 keyring
 testrepository
 oslo.config>=1.1.0
+# Needed for whitebox testing
+sqlalchemy
+MySQL-python