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/Ecc/Exception.py

@@ -16,7 +16,7 @@
 #
 from __future__ import print_function
 from __future__ import absolute_import
-from .Xml.XmlRoutines import *
+from Ecc.Xml.XmlRoutines import *
 import Common.LongFilePathOs as os
 
 # ExceptionXml to parse Exception Node of XML file