- moved b10-config_test.db from src/bin/stats/tests to
  src/bin/stats/tests/testdata

- renamed its name to b10-config.db

- changed its format to multiline

These changes are due to the reviewer's comment.

A list of instances for stats to request is obtained from the show_processes
command of Boss instead of asking the components config of Boss.

This information is used for other module e.g. stats to count running instances
of same module. The address information is seen in the third index of the
array.

It returns the "_address" attribute of the classes. This is used for the
"show_processes" command of Boss to provide address information.

The stats module decides if polling should be done by the the last time of
polling. If more than one seconds past since the last request to each module,
the stats module requests each module statistics data and then shows the latest
result. Otherwise, the stats module just shows statistics data which it has.

In the updating process, it communicates with the cfgmgr module for updating
statistics specification of each module. This fix is for separating such mixed
communication process.

- Fixed the incorrect previous fix.
  There should not be the inconsistency on number of mock Auth instances on
  both test scripts: b10-stats_test.py and b10-stats-httpd_test.py. In the
  previous change, there was the inconsistency in MockBoss class. Actually in
  b10-stats-httpd_test.py, the number of auth instances which Cfgmgr answers
  was four, but the number of actually invoked auth instances was one.

- Reduce the number of invoked mock Auth instances
  In theses test scripts, multiple Auth instances need to be invoked. But if
  four instances are actually invoked in these scripts, open files(ulimit -n)
  exceeds 256. In the environment where ulimit -n was set to 256, the
  b10-stats-httpd_test.py test failed actually.  In that case,
  b10-stats-httpd_test.py needs open files more than 256.  So the number of the
  auth instances in mock modules was reduced into 2 in the scripts. This fix is
  for the comment at #2136.

The extra MockAuth objects didn't shut down in
BaseModules.shutdown(). But these weren't needed for unittest of stats
httpd. So setting up and shutting up of them were moved to
b10-stats_test.py from test_utils.py.

integer

polling

do_polling for efficiency

Also added setting timeout value to one second for precise and
refactoring timeout handling

module

Changes in b10-stats_test.py:
 - added deeply checking statistics values of each of module and
   instance

 - added stats_server.shutdown() at the end of the test_config method.
   Because the running stats_server was never shut down even after
   stats_server.run() was invoked.

Changes in test_utils.py:
 - Changed the way of invoking multiple auth instances just for efficiency

the second argument of the the 'update_statistics_data' method

Instead of PID(Process Id) used in previous version of stats codes,
'mid' (module id) is used for identifying multiple instances of same
module. 'lname' of CC-session in stats codes is assigned to it.

The description about 'set' command was removed from the manpages, and
A 'poll-interval' config item was introduced into the manpages. Also
the implement, the testcases and specification related to the set
command were removed from source codes and the specfile.

one while stats module is working
also system test of statistics is disabled until codes of both
Boss(#2137) and Auth(#2138) due to their dependencies

* change of b10-config dbfile
* update specfile of MockBoss
* invoking three extra Auth modules at a time in the BaseModules class
* implement 'getstats' command in each mock module

since stats doesn't request only boss but request every module

Mock boss

Stats module asks cfgmgr components of boss config. This test db file
contains test components of boss. Data of components are assumed to be
used only for counting number of multi intances. Here the module of
the multi instances is Auth.

Because that is already done while creating a BaseModules object at the setUp
method

 - update last_update_time when initially updating statistics of stats
 - strict validation check of poll-interval
 - move the code requesting to boss inside of the main loop