Checkpoint commit for OPENDJ-1075 Port server make-ldif tool to the SDK
CR-2539

Initial port of entries generation from opendj server (opendj/trunk/opends/src/server/org/opends/server/tools/makeldif package)

* Behavior related to CLI is not adressed
* Lots of issues identified in the code review will be adressed in next commits

* Class organization
** MakeLDIFEntryReader class is the main entry point to generate entries
** TemplateFile class contains all classes related to template parsing and processing excluding tags
** TemplateTag class contains all tag-related classes
** MakeLDIFEntryReaderTestCase include initial tests from MakeLDIF and some additional tests