Do not create a message when:

When an existing item is updated within 6 hours after the initial insert
by the SAME user.
Merge remote-tracking branch 'origin/develop' into feature/CFD-193-Activity_stream_insert_update_messages
Comments messages fixed.
Changed message creation and updating conditions.
Made general functions for insert_node and for update_node.
Update.
Tests updated.
Comments. Tests are updated.
Merge remote-tracking branch 'origin/develop' into feature/CFD-193-Activity_stream_insert_update_messages

Conflicts:
	capacity4more/behat/features/activity_stream.feature
	capacity4more/behat/features/bootstrap/FeatureContext.php
Fixes after re-rolling.
Merge remote-tracking branch 'origin/develop' into feature/CFD-193-Activity_stream_insert_update_messages

Conflicts:
	capacity4more/behat/features/activity_stream.feature
	capacity4more/behat/features/bootstrap/FeatureContext.php
Comment.
Activity stream area name.
Test fixed.
Merge pull request #206 from capacity4dev/feature/CFD-193-Activity_stream_insert_update_messages

CFD-193-Activity stream: insert/update messages