fix(eChecklist-import): Fix error with formulas in status column

This should remedy the reported behavior of statuses quietly being changed to "Not Reviewed".
scan.inc - Added new set_Host_Error method to set the error value for a specific host
parse_excel_echecklist.php - explicitly check for the status to equal 1-of-7 expected values, if not, add note to finding, set scan error message, and default status to "Not Reviewed"
export.php - Added cell lock for A11:E{last row} with the default password of "sagacity" (all lowercase)

Fixes #80

classes/scan.inc

@@ -83,7 +83,7 @@ class scan
     /**
      * Array of hosts
      *
-     * @var array
+     * @var array:host_list
      */
     protected $host_list = array();
 
@@ -613,6 +613,25 @@ class scan
     {
         $this->host_count = $total_host_count_in;
     }
+    
+    /**
+     * Method to set a host error
+     * 
+     * @param int $tgt_id
+     * @param boolean $is_error
+     * @param string $err_msg
+     */
+    public function set_Host_Error($tgt_id, $is_error, $err_msg = null)
+    {
+        foreach($this->host_list as $x => $h) {
+            /** @var host_list $h */
+            if($h->getTargetId() == $tgt_id) {
+                $this->host_list[$x]->setScanError($is_error);
+                $this->host_list[$x]->setScanNotes($err_msg);
+                break;
+            }
+        }
+    }
 
     /**
      * Function to return string of the td row for the upload progress page