Conflicts:
	ChangeLog
	src/lib/config/tests/testdata/spec40.spec

If a target module returns data whose key name is such a identifier type, the
stats module can identify statistics data. The stats module checks the
validation of data even if such a identifier is specified. But when the stats
shows statistics data e.g. via bindctl, this type of identifier is not shown
for now.

A named_set data type is supported in a spec file in each module for
statistics.

Stats updates corresponding statistics data which each module returns.  For
that, the method "update_statistics_data()" was updated to merge recursively
old value and new value each other. As for this merging, a new method
"merge_oldnew" was introduced into stats.py. This method is intended to be
internally used so far.

When the set command was used for collecting statistics data, the action was
randomly. But in the case that periodical polling is used for collecting
statistics data, update_modules doesn't need to be invoked so many times every
time update_statistics_data is invoked. Invoking update_module() causes an IO
wait for receiving statistics spec from Cfgmgr.

Not self.stats.mccs.specification but self.stats.modules['Stats'] should be set
the invalid spec_module into. And it should check whether StatsError is raised
by setting the owner to the self module name in the argument of command_show.

Because do_polling() is done when the show command is invoked, the do_polling
method didn't need to be done when the stats is starting.  Related to this
change, the b10-stats_test.py was changed. do_polling() is inserted before the
assertion of statistics_data.

- Other conditions are considered. One case is that two args are string type,
  another case is that either of them is None type.

- _accum() was moved to outside of the Stats class for testing it individually.

- revised the FIXME description in update_statistics_data() according to the
  above changes

- 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