test: Improve io test perfomance

Local test improves performance by 15%.

test/io-tests/configs/app-settings.config

@@ -1,5 +1,2 @@
-db-pool = 1
-db-pool-timeout = 1
-
 app.settings.external_api_secret = "0123456789abcdef"
 db-config = false

test/io-tests/configs/base64-secret-from-file.config

@@ -1,5 +1,3 @@
-db-pool = 1
-
 # Read secret from a file: /dev/stdin (alias for standard input)
 jwt-secret = "@/dev/stdin"
 jwt-secret-is-base64 = true

test/io-tests/configs/dburi-from-file.config

@@ -1,4 +1,3 @@
 db-uri = "@/dev/stdin"
-db-pool = 1
 jwt-secret = "reallyreallyreallyreallyverysafe"
 db-config = false

test/io-tests/configs/role-claim-key.config

@@ -1,4 +1,3 @@
-db-pool = 1
 jwt-role-claim-key = "$(ROLE_CLAIM_KEY)"
 jwt-secret = "reallyreallyreallyreallyverysafe"
 db-config = false

test/io-tests/configs/secret-from-file.config

@@ -1,5 +1,3 @@
-db-pool = 1
-
 # Read secret from a file: /dev/stdin (alias for standard input)
 jwt-secret = "@/dev/stdin"
 jwt-secret-is-base64 = false

test/io-tests/configs/sigusr2-settings-external-secret.config

@@ -1,5 +1,3 @@
-db-pool = 1
-
 jwt-secret = "$(JWT_SECRET_FILE)"
 jwt-secret-is-base64 = false
 db-config = false

test/io-tests/configs/sigusr2-settings.config

@@ -1,5 +1,4 @@
 db-schemas = "public"
-db-pool = 1
 
 app.settings.name_var = "John"
 jwt-secret = "invalidinvalidinvalidinvalidinvalid"

test/io-tests/configs/simple.config

@@ -1,3 +1,2 @@
-db-pool = 1
 jwt-secret = "reallyreallyreallyreallyverysafe"
 db-config = false