[Server][ArmNagiosNDOUtils] Add a new function: makeSelectHostArg
[Server][ArmNagiosNDOUtils] Fix using privatecontext variable.
[Server][ArmNagiosNDOUtils] Add a new function: getHost
[Server][ArmNagiosNDOUtils] Use makeSelectHostArg() function and
getHost() function.
[Server][ArmNagiosNDOUtils] Change using column.
[Server][ArmNagiosNDOUtils] Add a new function: makeSelectHostgroupArg

And, add a new ColumnDef: COLUMN_DEF_HOSTGROUPS
[Server][ArmNagiosNDOUtils] Add a new function: getHostgroup
[Server][ArmNagiosNDOUtils] Insert the AUTO_INCREMENT_VALUE to
hostgroup.id.
[Server][ArmNagiosNDOUtils] Use the makeSelectHostgroupArg() function
and the getHostgroup() function.
[Server][ArmNagiosNDOUtils] Add a new function:
makeSelectHostgroupMembersArg
[Server][ArmNagiosNDOUtils] Fix a wrong function name.
[Server][ArmNagiosNDOUtils] Add a new function: getHostgroupMembers
[Server][ArmNagiosNDOUtils] Use the makeSelectHostgroupMembersArg()
function and the getHostgroupMembers() function.
[Server][ArmNagiosNDOUtils] Fix a column name.

host_id ->
host_object_id
[Server][ArmNagiosNDOUtils] Fix wrong join column name.
[Server][ArmNagiosNDOUtils] Change a using column.
[Server][ArmNagiosNDOUtils] Fix the wrong function call.
Merge branch 'issue155'
Merge branch 'issue137'
[client] Implement the first version for showing connection status with servers.