Add configuration ExceptionList and IgnoreFiles for package config files. So users can rely on this to ignore some Ecc issues. Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Chao Zhang <chao.b.zhang@intel.com> Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>