pgsql: Fix timeout handling in logical replication worker

Fix timeout handling in logical replication worker

The timestamp tracking the last moment a message is received in a
logical replication worker was initialized in each loop checking if a
message was received or not, causing wal_receiver_timeout to be ignored
in basically any logical replication deployments.  This also broke the
ping sent to the server when reaching half of wal_receiver_timeout.

This simply moves the initialization of the timestamp out of the apply
loop to the beginning of LogicalRepApplyLoop().

Reported-by: Jehan-Guillaume De Rorthais
Author: Julien Rouhaud
Discussion: https://postgr.es/m/CAOBaU_ZHESFcWva8jLjtZdCLspMj7vqaB2k++rjHLY897ZxbYw@mail.gmail.com
Backpatch-through: 10

Branch
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REL_11_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/feed5ee4753afa1b53e441271cc3e28345bcae0b

Modified Files
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src/backend/replication/logical/worker.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)