Use environment variables for configuration in developer tooling

Avoid the need for configuration files for temporary database connections.

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

@@ -1,6 +1,3 @@
-db-uri = "$(POSTGREST_TEST_CONNECTION)"
-db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
 db-pool-timeout = 1
 server-host = "127.0.0.1"

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

@@ -1,6 +1,3 @@
-db-uri = "$(POSTGREST_TEST_CONNECTION)"
-db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
 server-host = "127.0.0.1"
 server-port = 49421

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

@@ -1,6 +1,4 @@
 db-uri = "@/dev/stdin"
-db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
 server-host = "127.0.0.1"
 server-port = 49421

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

@@ -1,6 +1,3 @@
-db-uri = "$(POSTGREST_TEST_CONNECTION)"
-db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
 server-host = "127.0.0.1"
 server-port = 49421

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

@@ -1,6 +1,3 @@
-db-uri = "$(POSTGREST_TEST_CONNECTION)"
-db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
 server-host = "127.0.0.1"
 server-port = 49421

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

@@ -1,6 +1,4 @@
-db-uri = "$(POSTGREST_TEST_CONNECTION)"
 db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
 server-host = "127.0.0.1"
 server-port = 49421

test/io-tests/configs/simple.config

@@ -1,6 +1,3 @@
-db-uri = "$(POSTGREST_TEST_CONNECTION)"
-db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
 server-host = "127.0.0.1"
 server-port = 49421

test/io-tests/configs/unix-socket.config

@@ -1,7 +1,3 @@
-db-uri = "$(POSTGREST_TEST_CONNECTION)"
-db-schemas = "test"
-db-anon-role = "postgrest_test_anonymous"
 db-pool = 1
-server-host = "127.0.0.1"
 server-unix-socket = "$(POSTGREST_TEST_SOCKET)"
 jwt-secret = "reallyreallyreallyreallyverysafe"