[DMV-12] add: - 'DirectoryScanningChangeListener'.

- 'highwater-mark' value in integration tests for both datamovers.
change: - 'Main.UnhandledPathsChangeListener' renamed to 'PathHandlerInterceptor' and moved to 'common'.
- 'LocalProcessor' constructor and 'LocalProcessor.create' method removed.
- 'IFileStore' extends 'ISelfTestable' and default 'check' method implementation in 'FileStore'.
minor:
- Javadoc improved in 'IPathMover' and 'FileStoreRemoteMounted'.
- final keyword added when possible.

SVN: 6047

integration-tests/templates/datamover-analysis/etc/service.properties

 incoming-dir = ../data/in-analysis
 buffer-dir = data/buffer
+# Value must be specified in kilobytes (1048576 = 1024 * 1024 = 1GB). If no high water mark is
+# specified or if value is negative, the system will not be watching.
+buffer-dir.highwater-mark = 1048576
 outgoing-dir = ../data/out-analysis
+# outgoing-dir.highwater-mark = 1048576
 manual-intervention-dir = data/manual_intervention
 check-interval = 2
 quiet-period = 5

integration-tests/templates/datamover-raw/etc/service.properties

 incoming-dir = ../data/in-raw
 buffer-dir = data/buffer
+# Value must be specified in kilobytes (1048576 = 1024 * 1024 = 1GB). If no high water mark is
+# specified or if value is negative, the system will not be watching.
+buffer-dir.highwater-mark = 1048576
 outgoing-dir = ../data/out-raw
+# outgoing-dir.highwater-mark = 1048576
 manual-intervention-dir = data/manual_intervention
 extra-copy-dir = ../data/analysis-copy
 treat-incoming-as-remote = true