Bug #46800 for bind9-public: more time needed in runtime test; handle named.pid removal races better.

Test 2 took 4 seconds to emit the expected message in the openbsd set machine. S:runtime:Thu Dec 7 04:34:12 PST 2017 I:verifying that named started normally (1) I:verifying that named checks for conflicting listeners (2) I:failed I:verifying that named checks for conflicting named processes (3) I:failed I:verifying that 'lock-file none' disables process check (4) I: checking that named refuses to reconfigure if working directory is not writable (5) I: checking that named refuses to reconfigure if managed-keys-directory is not writable (6) I: checking that named refuses to reconfigure if new-zones-directory is not writable (7) I: checking that named refuses to start if working directory is not writable (8) I:failed I: checking that named refuses to start if managed-keys-directory is not writable (9) I:failed I:exit status: 4 R:FAIL E:runtime:Thu Dec 7 04:34:39 PST 2017

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4846. [test] Adjust timing values in runtime system test. Address named.pid removal races in runtime system test. [RT #46800]

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