pgAdmin 4 commit: Ensure we pick up the messages from the currentquery

Ensure we pick up the messages from the current query and not a previous one. Fixes #3094

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=08b3ccc01a4d57e8ea3657f8882a53dcd1b99386
Author: Khushboo Vashi <khushboo.vashi@enterprisedb.com>

Modified Files
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web/pgadmin/utils/driver/abstract.py          |  1 +
web/pgadmin/utils/driver/psycopg2/__init__.py | 64 +++++++++------------------
2 files changed, 21 insertions(+), 44 deletions(-)