Move utils into the reviewstats namespace.

Change-Id: I1b8418d7e0885d963df32f4c718855d2e989107d

openapproved.py

@@ -26,7 +26,7 @@ import getpass
 import optparse
 import sys
 
-import utils
+from reviewstats import utils
 
 
 def main(argv=None):

openreviews.py

@@ -23,7 +23,7 @@ import logging
 import optparse
 import sys
 
-import utils
+from reviewstats import utils
 
 
 def sec_to_period_string(seconds):

reviewstats/tests/test_projectinfo.py

@@ -11,7 +11,7 @@
 # under the License.
 
 from reviewstats.tests import base
-import utils
+from reviewstats import utils
 
 
 class TestProjectInfo(base.TestCase):