PM-1903 "0017014: ProcessMaker loses connection..." SOLVED

Issue:
    0017014: ProcessMaker loses connection with database -> lack of mysql_close()
Cause:
    - Error al tratar de conectarse a la BD
    - Segun el feedback proporcianado, el problema central
      se basa en que no se esta haciendo uso del mysql_close()
Solution:
    - Se a logrado implementar el close de los connects a BD abiertos
    - Este cambio repercute en toda la funcionalidad de ProcessMaker. Por lo
      que se debera hacer un test con todos los flags de depuracion
      habilitados, tambien con todos los plugins habilitados/deshabilitados
    - Tambien se debe considerar otros "test cases"

gulliver/thirdparty/propel/Propel.php

@@ -596,16 +596,20 @@ class Propel {
 	 *
 	 * @return     void
 	 */
-	public static function close()
-	{
-		$last = '';
- 		foreach(self::$connectionMap as $conn) {
-			if ($last != $conn->lastQuery) {
-				$conn->close();
-			}
-			$last = $conn->lastQuery;
- 		}
-	}
+    public static function close()
+    {
+        $lastQuery = "";
+
+        foreach (self::$connectionMap as $cnn) {
+            if (!($cnn instanceof DBArrayConnection)) {
+                if (gettype($cnn->getResource()) == "resource" && $cnn->isConnected() && $cnn->lastQuery != $lastQuery) {
+                    $cnn->close();
+                }
+
+                $lastQuery = $cnn->lastQuery;
+            }
+        }
+    }
 
     /**
      * @param  $name string The connection name
@@ -622,7 +626,7 @@ class Propel {
         /*----------------------------------********---------------------------------*/
          }
         /*----------------------------------********---------------------------------*/
-        
+
         if (! empty(self::$configuration['datasources'][$name]['connection'])) {
             return self::getConnection($name);
         }
@@ -630,7 +634,7 @@ class Propel {
         // the connection names always should be have a underscore like: workflow_ro, rbac_rw
         // on fallback, we will try found a connection named: "workflow" if "workflow_ro" does not exist.
         // the name without the "_ro" part.
-        
+
         $defaultDbName = substr($name, 0, strrpos($name, '_'));
 
         if (! empty(self::$configuration['datasources'][$defaultDbName]['connection'])) {

workflow/public_html/app.php

@@ -1,4 +1,15 @@
 <?php
+register_shutdown_function(
+    create_function(
+        "",
+        "
+        if (class_exists(\"Propel\")) {
+            Propel::close();
+        }
+        "
+    )
+);
+
 /*
  * ProcessMaker Web Application Bootstrap
  */
@@ -30,7 +41,7 @@ try {
     }
     $loader->add($rootDir . 'workflow/engine/src/', "ProcessMaker");
     $loader->add($rootDir . 'workflow/engine/src/');
-    
+
     // add vendors to autoloader
     $loader->add($rootDir . 'vendor/luracast/restler/vendor', "Luracast");
     $loader->add($rootDir . 'vendor/bshaffer/oauth2-server-php/src/', "OAuth2");