changed txt extensions in filenames to out and rst (#161)

Author: shuangela

source/includes/tutorials/cdc-handler/output/status-2.txt renamed to source/includes/tutorials/cdc-handler/output/status-2.out

@@ -82,7 +82,7 @@ When you start the sandbox, Docker downloads any images it needs to run.
 After Docker downloads and builds the images, you should see the following
 output in your development environment:
 
-.. include:: /includes/tutorials/docker-success.txt
+.. include:: /includes/tutorials/docker-success.rst
 
 .. include:: /includes/tutorials/port-mapping-note.rst
 

source/includes/tutorials/cdc-handler/output/status.txt renamed to source/includes/tutorials/cdc-handler/output/status.out

@@ -120,7 +120,7 @@ Migrate a Collection to a Time Series Collection
       If your source connector started successfully, you should see the
       following output:
 
-      .. literalinclude:: /includes/tutorials/time-series/output/status.txt
+      .. literalinclude:: /includes/tutorials/time-series/output/status.out
          :language: text
          :copyable: false
 
@@ -134,7 +134,7 @@ Migrate a Collection to a Time Series Collection
       The output should show topic data as it is published by the source
       connector that resembles the following:
 
-      .. literalinclude:: /includes/tutorials/time-series/output/kc.txt 
+      .. literalinclude:: /includes/tutorials/time-series/output/kc.out 
          :language: text
          :copyable: false