Update showoci_service.py

Add line to initialize data in the class ShowOCIService.  This does not have any affect on running showoci from the command line.  However this does reset data{} to empty when importing the showoci classes and running from a wrapper package.

examples/showoci/showoci_service.py

@@ -475,6 +475,9 @@ class ShowOCIService(object):
     ##########################################################################
     def __init__(self, flags):
 
+        # Initiate data everytime class is instantiated
+        self.data = {}
+
         if not isinstance(flags, ShowOCIFlags):
             raise TypeError("flags must be ShowOCIFlags class")