Team permission to create repository in organization (#8312)

* Add team permission setting to allow creating repo in organization.

Signed-off-by: David Svantesson <davidsvantesson@gmail.com>

* Add test case for creating repo when have team creation access.

Signed-off-by: David Svantesson <davidsvantesson@gmail.com>

* build error: should omit comparison to bool constant

Signed-off-by: David Svantesson <davidsvantesson@gmail.com>

* Add comment on exported functions

* Fix fixture consistency, fix existing unit tests

* Fix boolean comparison in xorm query.

* addCollaborator and changeCollaborationAccessMode separate steps

More clear to use different if-cases.

* Create and commit xorm session

* fix

* Add information of create repo permission in team sidebar

* Add migration step

* Clarify that repository creator will be administrator.

* Fix some things after merge

* Fix language text that use html

* migrations file

* Create repository permission -> Create repositories

* fix merge

* fix review comments

templates/org/home.tmpl

@@ -22,7 +22,7 @@
 	<div class="ui container">
 		<div class="ui mobile reversed stackable grid">
 			<div class="ui eleven wide column">
-				{{if .IsOrganizationOwner}}
+				{{if .CanCreateOrgRepo}}
 					<div class="text right">
 						<a class="ui green button" href="{{AppSubUrl}}/repo/create?org={{.Org.ID}}"><i class="octicon octicon-repo-create"></i> {{.i18n.Tr "new_repo"}}</a>
 					</div>