Minor improvements to file URI cleaning in VFS transport

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@179430 a5903396-d722-0410-b921-86c7d4935375
Applying patch TA-676 by DimuthuD

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@179431 a5903396-d722-0410-b921-86c7d4935375
changes after code review

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@179432 a5903396-d722-0410-b921-86c7d4935375