[Client][HatoholPrivilegeEditDialog] Add a new column for edit hostgroup
privilege.
[Client][HatoholPrivilegeEditDialog] Add a new function:
setupSelectHostgroupDialog

I will call the dialog for editing privilege of hostgroup (Not
implemented yet) in this function.
[Server][FaceRest] Add a new "numberOfHostgroups" object.
[Client][HatoholHostgroupPrivilegeEditDialog] Add a new dialog:
HatoholHostgroupPrivilegeEditDialog
[Client][HatoholPrivilegeEditDialog] Can call
HatoholHostgroupPrivilegeEditDialog.
[Server][FaceRest] Return number of hostgroups and number of allowed
hostgroups when query has "showHostgroup" and  "targetUser" parameter.
[Client][HatoholPrivilegeEditDialog] Show number of allowed hostgroup.
[Server][FaceRest] Judge hostgroupId.

When number of hostgroups is only 1 and hostgroupId is ALL_HOST_GROUPS,
substitute value of numberOfHostgroups variable for
numberOfAllowedHostgroups variable.
[Server][HatoholPrivilegeEditDialog] Change table column name.

Allow ->
All Allow

Because, the word "Allow" is ambiguous.
(Allowed all hosts in the server, Allowed some hostgroups in the
server.)
[Client][HatoholPrivilegeEditDialog] Fix doesn't pass value of userId
to HatoholHostgroupPrivilegeEditDialog.
[Server][FaceRest] Return number of allowed hostgroups.
[Client][HatoholHostgroupPrivilegeEditDialog] Check the box of already allowed hostgroup.
[Client][HatoholHostgroupPrivilegeEditDialog] Fix wrong class name.
[Client][HatoholHostgroupPrivilegeEditDialog] Make POST query of access-info.

But, I found that current revision can't show allowed hostgroup.
I didn't try to check make DELETE query of access-info.
[Client][HatoholHostgroupPrivilegeEditDialog] Fix
updateAllowCheckboxes() function.
[Client][HatoholHostgroupPrivilegeEditDialog] Fix to be able to add and
delete Hostgroup privilege.
[Client][HatoholHostgroupPrivilegeEditDialog] Fix wrong parameter name.

numServers ->
numHostgroups
[Client][HatoholHostgroupPrivilegeEditDialog] Fix wrong object
name(number).
[Client][HatoholHostgroupPrivilegeEditDialog] Fix a problem that this
dialog can't give hostgroup privilege to a guest user when a guest
user isn't given hostgroup.
Revert "[Server][FaceRest] Return number of allowed hostgroups."

This reverts commit d45968296f7f92c826f1378658168915a643d482.

First in HatoholHostgroupPrivilegeEditDialog of client, I thought to
need this number. But, I advanced implementation, I think that this
numbaer doesn't need.