test_email_notifications: Migrate ldap tests to the new format.
test_email_notifications: Migrate ldap tests to the new format.

shubhamdhama/zulip,rht/zulip,rht/zulip,eeshangarg/zulip,timabbott/zulip,rht/zulip,brainwane/zulip,kou/zulip,andersk/zulip,synicalsyntax/zulip,rht/zulip,showell/zulip,showell/zulip,punchagan/zulip,andersk/zulip,andersk/zulip,shubhamdhama/zulip,shubhamdhama/zulip,showell/zulip,eeshangarg/zulip,showell/zulip,kou/zulip,hackerkid/zulip,hackerkid/zulip,timabbott/zulip,kou/zulip,shubhamdhama/zulip,hackerkid/zulip,timabbott/zulip,showell/zulip,timabbott/zulip,shubhamdhama/zulip,timabbott/zulip,eeshangarg/zulip,punchagan/zulip,andersk/zulip,zulip/zulip,punchagan/zulip,zulip/zulip,kou/zulip,punchagan/zulip,kou/zulip,rht/zulip,zulip/zulip,zulip/zulip,brainwane/zulip,rht/zulip,synicalsyntax/zulip,hackerkid/zulip,hackerkid/zulip,zulip/zulip,brainwane/zulip,showell/zulip,eeshangarg/zulip,punchagan/zulip,hackerkid/zulip,andersk/zulip,timabbott/zulip,brainwane/zulip,eeshangarg/zulip,punchagan/zulip,showell/zulip,andersk/zulip,kou/zulip,brainwane/zulip,brainwane/zulip,shubhamdhama/zulip,synicalsyntax/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,synicalsyntax/zulip,rht/zulip,timabbott/zulip,synicalsyntax/zulip,kou/zulip,synicalsyntax/zulip,shubhamdhama/zulip,zulip/zulip,punchagan/zulip,eeshangarg/zulip,synicalsyntax/zulip,hackerkid/zulip,brainwane/zulip