The sentence that get the server version was not working when de PostgreSQL version is Beta (#292)

Issue: 85993

Author: iroqueta

java/src/main/java/com/genexus/db/driver/GXDBMSpostgresql.java

@@ -175,7 +175,7 @@ public java.util.Date serverDateTime(GXConnection con) throws SQLException
 
 	public String serverVersion(GXConnection con) throws SQLException
 	{
-		ResultSet rslt = con.getStatement("_ServerVERSION_", "SHOW server_version", false).executeQuery();
+		ResultSet rslt = con.getStatement("_ServerVERSION_", "select character_value from information_schema.sql_implementation_info where implementation_info_name = 'DBMS VERSION'", false).executeQuery();
 
 		rslt.next();
 		String value = rslt.getString(1);