[SEBA-450] (part 2)

Add tox testing support on additional XOS library modules:

- xos-api
- xos-kafka (has no tests)
- xos-migrate (has no tests)
- xos-synchronizer

Change-Id: I98195bc9747971d3515882d517affe058dd86ac5
diff --git a/lib/xos-synchronizer/xossynchronizer/apiaccessor.py b/lib/xos-synchronizer/xossynchronizer/apiaccessor.py
index a56381b..b4e3b13 100644
--- a/lib/xos-synchronizer/xossynchronizer/apiaccessor.py
+++ b/lib/xos-synchronizer/xossynchronizer/apiaccessor.py
@@ -13,9 +13,11 @@
 # limitations under the License.
 
 
-from modelaccessor import ModelAccessor
+from __future__ import absolute_import
+
 import datetime
-import time
+
+from .modelaccessor import ModelAccessor
 
 
 class CoreApiModelAccessor(ModelAccessor):