minor: Rename stream_map -> user_stream_map.
minor: Rename stream_map -> user_stream_map.

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