BIND 10 #1856: lettuce multi_instance test should use a dedicated DB file

[BIND 10 Development]

#1856: lettuce multi_instance test should use a dedicated DB file
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            Reporter:  jinmei        |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  medium        |                    Milestone:  Next-
           Component:  b10-auth      |  Sprint-Proposed
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 It uses the system (or test environment if it's in-source) version of
 SQLite3 DB file, and depending on the content the test could fail.

 I'd also suggest it uses more verbose logging level like other test
 configs:

 {{{
 {"version": 2, "Logging": {"loggers": [{"name": "*", "severity": "DEBUG",
 "output_options": [{"output": "stderr", "maxsize": 100000, "maxver": 5,
 "destination": "console", "flush": true}], "debuglevel": 100}]}, "Auth":
 {"listen_on": [{"port": 47806, "address": "0.0.0.0"}]}, "Boss":
 {"components": {"b10-auth-2": {"kind": "needed", "special": "auth"},
 "b10-auth": {"kind": "needed", "special": "auth"}, "b10-cmdctl": {"kind":
 "needed", "special": "cmdctl"}}}}
 }}}

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Ticket URL: <http://bind10.isc.org/ticket/1856>
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BIND 10 Development