Fix the Docker test script

Author: shahmishal

ci_test.py

@@ -20,6 +20,7 @@
 def run_command(cmd):
     print("Running: {}".format(cmd))
     p = subprocess.Popen(cmd, shell=True)
+    (output, err) = p.communicate()
     return p.wait()
 
 
@@ -52,7 +53,7 @@ def main():
         print("Testing {}".format(dockerfile))
         log_file = dockerfile.replace(docker_dir,"").replace("/", "_")
         log_file = "{}.log".format(log_file)
-        cmd = "docker build --no-cache {} &> {}".format(dockerfile, log_file)
+        cmd = "docker build --no-cache=true {} &> {}".format(dockerfile, log_file)
         status = run_command(cmd)
         results[dockerfile] = status
         if status != 0: