dovetail tool: offline support

JIRA: DOVETAIL-164

usage:
dovetail run --testsuite <testsuite> --offline
1,if --offline given, can run offline by using local docker images
(if there is no images, will get an error in log, images can be
pulled from dockerhub or downloaded from artifacts.opnfv.org )
2,if --offline not given, will run online, which means
pull docker image from dockerhub

Change-Id: I87ab35c82e59fb13a7a88c38d233e89285efc4d3
Signed-off-by: MatthewLi <matthew.lijun@huawei.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index aeb4bf33..a84dd400 100644
--- a/setup.py
+++ b/setup.py
@@ -10,5 +10,5 @@
 import setuptools
 
 setuptools.setup(
-    setup_requires=['pbr>=2.0.0'],
+    setup_requires=['pbr==2.0.0'],
     pbr=True)