Disable connection reaping in test environment

This can cause flaky tests when we have threads that create new
connections that are reaped in between tests that are inside a
before_all context

config/database.yml.decomposed-clusterwide-postgresql

@@ -60,6 +60,7 @@ test:
     username: postgres
     password:
     prepared_statements: false
+    reaping_frequency: nil
     variables:
       statement_timeout: 15s
   ci:
@@ -68,19 +69,23 @@ test:
     username: postgres
     password:
     prepared_statements: false
+    reaping_frequency: nil
     variables:
       statement_timeout: 15s
   main_clusterwide:
     <<: *main
     database_tasks: false
+    reaping_frequency: nil
   geo:
     <<: *defaults
     database: gitlabhq_geo_test
     username: postgres
     password:
+    reaping_frequency: nil
   embedding:
     <<: *defaults
     database: gitlabhq_embedding_test
     username: postgres
     password:
+    reaping_frequency: nil
 

config/database.yml.decomposed-postgresql

@@ -84,6 +84,7 @@ test: &test
     password:
     host: localhost
     prepared_statements: false
+    reaping_frequency: nil
     variables:
       statement_timeout: 15s
   ci:
@@ -94,6 +95,7 @@ test: &test
     password:
     host: localhost
     prepared_statements: false
+    reaping_frequency: nil
     variables:
       statement_timeout: 15s
   geo:
@@ -103,6 +105,7 @@ test: &test
     username: postgres
     password:
     host: localhost
+    reaping_frequency: nil
   embedding:
     adapter: postgresql
     encoding: unicode
@@ -110,3 +113,4 @@ test: &test
     username: postgres
     password:
     host: localhost
+    reaping_frequency: nil

config/database.yml.postgresql

@@ -104,6 +104,7 @@ test: &test
     password:
     host: localhost
     prepared_statements: false
+    reaping_frequency: nil
     variables:
       statement_timeout: 15s
   ci:
@@ -115,6 +116,7 @@ test: &test
     password:
     host: localhost
     prepared_statements: false
+    reaping_frequency: nil
     variables:
       statement_timeout: 15s
   geo:
@@ -124,6 +126,7 @@ test: &test
     username: postgres
     password:
     host: localhost
+    reaping_frequency: nil
   embedding:
     adapter: postgresql
     encoding: unicode
@@ -131,3 +134,4 @@ test: &test
     username: postgres
     password:
     host: localhost
+    reaping_frequency: nil