pgsql: Refactor TAP test authentication/001_password.pl

Refactor TAP test authentication/001_password.pl

The test is changed to test for connection strings rather than specific
roles, and the reset logic of pg_hba.conf is extended so as the database
and user name entries can be directly specified.  This is aimed at being
used as a base for more test scenarios of pg_hba.conf and authentication
paths.

Author: Bertrand Drouvot, Michael Paquier
Discussion: https://postgr.es/m/Yz0xO0emJ+mxtj2a@paquier.xyz

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/051b096b8dd3b65f8e4528a8cd24a8702646e8b2

Modified Files
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src/test/authentication/t/001_password.pl | 60 ++++++++++++++++---------------
1 file changed, 31 insertions(+), 29 deletions(-)