BaseTools/Ecc: Fix import issues

1. Complete the full path for import statement. Use "EccMain" to
replace "Ecc" for the absolute path support.
2. Fix some issues on configuration file.
3. Fix an issue of RaiseError not working in EdkLogger.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hess Chen <hesheng.chen@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Source/Python/Common/EdkLogger.py

@@ -1,7 +1,7 @@
 ## @file
 # This file implements the log mechanism for Python tools.
 #
-# Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD License
 # which accompanies this distribution.  The full text of the license may be found at
@@ -198,6 +198,7 @@ def error(ToolName, ErrorCode, Message=None, File=None, Line=None, ExtraData=Non
         LogText = _ErrorMessageTemplateWithoutFile % TemplateDict
 
     _ErrorLogger.log(ERROR, LogText)
+    RaiseError = IsRaiseError
     if RaiseError:
         raise FatalError(ErrorCode)