Fix flaky tests by increasing timeout

[jiahuili430]

Overview

Fix the following error by increasing the timeout.

Error logs:

::in function gen_server:call/3 (gen_server.erl, line 385)
in call from couch_proc_manager:get_proc/1 (src/couch_proc_manager.erl, line 90)
in call from couch_query_servers:get_os_process/1 (src/couch_query_servers.erl, line 713)
in call from couch_js_tests:should_exit_on_internal_error/1 (test/eunit/couch_js_tests.erl, line 378)
in call from eunit_test:run_testfun/1 (eunit_test.erl, line 71)
in call from eunit_proc:run_test/1 (eunit_proc.erl, line 531)
in call from eunit_proc:with_timeout/3 (eunit_proc.erl, line 356)
in call from eunit_proc:handle_test/2 (eunit_proc.erl, line 514)
**exit:{timeout,
    {gen_server,call,
        [couch_proc_manager,
         {get_proc,
             {client,undefined,undefined,<<"javascript">>,undefined,
                 undefined,undefined}},
         5000]}}

Testing recommendations

make eunit apps=couch suites=couch_js_tests

Related Issues or Pull Requests

Checklist

• Code is written and works correctly
• Changes are covered by tests
• Any new configurable parameters are documented in rel/overlay/etc/default.ini
• Documentation changes were made in the src/docs folder
• Documentation changes were backported (separated PR) to affected branches