StorageProviderVersion extended + TestConfiguration better names

Author: alex-kulakov

Orm/Xtensive.Orm.Tests.Framework/StorageProviderVersion.cs

@@ -31,9 +31,15 @@ public static class StorageProviderVersion
     public static Version PostgreSql90 = new Version(9, 0);
     public static Version PostgreSql91 = new Version(9, 1);
     public static Version PostgreSql92 = new Version(9, 2);
+    public static Version PostgreSql96 = new Version(9, 6);
     public static Version PostgreSql100 = new Version(10, 0);
     public static Version PostgreSql110 = new Version(11, 0);
     public static Version PostgreSql120 = new Version(12, 0);
+    public static Version PostgreSql130 = new Version(13, 0);
+    public static Version PostgreSql140 = new Version(14, 0);
+    public static Version PostgreSql150 = new Version(15, 0);
+    public static Version PostgreSql160 = new Version(16, 0);
+    public static Version PostgreSql170 = new Version(17, 0);
 
     public static Version MySql55 = new Version(5, 5);
     public static Version MySql56 = new Version(5, 6);

Orm/Xtensive.Orm.Tests.Framework/TestConfiguration.cs

@@ -71,12 +71,12 @@ public void InitAppContextSwitches()
     private void InitPostgreSqlSwitches()
     {
       var infinityAliasesValue = GetEnvironmentVariable(InfinityAliasesKey);
-      if (bool.TryParse(infinityAliasesValue, out var bbb)) {
-        AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", !bbb);
+      if (bool.TryParse(infinityAliasesValue, out var switch1Value)) {
+        AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", !switch1Value);
       }
       var legacyTimestampsValue = GetEnvironmentVariable(LegacyTimestapmKey);
-      if (bool.TryParse(legacyTimestampsValue, out var ccc)) {
-        AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", ccc);
+      if (bool.TryParse(legacyTimestampsValue, out var switch2Value)) {
+        AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", switch2Value);
       }
     }