node tests: Add test_realm_integer test for bot_creation_policy.
node tests: Add test_realm_integer test for bot_creation_policy.

This fills in a missing test I noticed while reviewing the adjacent
code.

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