test_home: Fix missing do_change_plan_type import.
test_home: Fix missing do_change_plan_type import.

andersk/zulip,eeshangarg/zulip,kou/zulip,eeshangarg/zulip,punchagan/zulip,rht/zulip,rht/zulip,kou/zulip,zulip/zulip,rht/zulip,punchagan/zulip,rht/zulip,punchagan/zulip,kou/zulip,eeshangarg/zulip,kou/zulip,hackerkid/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,kou/zulip,rht/zulip,zulip/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,punchagan/zulip,andersk/zulip,zulip/zulip,zulip/zulip,eeshangarg/zulip,kou/zulip,zulip/zulip,rht/zulip,hackerkid/zulip,punchagan/zulip,andersk/zulip,andersk/zulip,kou/zulip,hackerkid/zulip,rht/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,hackerkid/zulip