More fixes.

Change-Id: Ibfde66d5895dc691473a9d354beb2176c3701947
Important fixes
- Fixed bugs while closing all channels while the app gets killed / closed
- Fixed various debug messages to make it more appropriate
- Made openLogicalChannel attribure 'Nullable'
- Tested with SIM_SE_TEST APP & Wallet 2.0
- In DOMSecureElement.js added initialize private func to instatiate the objects meta data
- Some nits

Change-Id: I44ee5cb4d5eb1577127dc40b565fec768b9be706