Changes to logging subsystem:
Changes to logging subsystem:

Duplicate normal logging to /dev/console.  This to support serial logging from boot when console=/dev/ttys0 is set in the kernel boot options.
Add Error logging to all non-shell based operations without it.
Force verbose logging to local log file only.

ryanmiao/WALinuxAgent,yuezh/WALinuxAgent,SuperScottz/WALinuxAgent,karataliu/WALinuxAgent,thomas1206/WALinuxAgent,jerickso/WALinuxAgent,lizzha/WALinuxAgent,andyliuliming/WALinuxAgent,lizzha/WALinuxAgent,AbelHu/WALinuxAgent,Azure/WALinuxAgent,Azure/WALinuxAgent,nathanleclaire/WALinuxAgent,hglkrijger/WALinuxAgent,AbelHu/WALinuxAgent,karataliu/WALinuxAgent,rjschwei/WALinuxAgent,imikushin/WALinuxAgent,jerickso/WALinuxAgent,andyliuliming/WALinuxAgent,imikushin/WALinuxAgent,nathanleclaire/WALinuxAgent,fieryorc/WALinuxAgent,SuperScottz/WALinuxAgent,yuezh/WALinuxAgent,ryanmiao/WALinuxAgent,hglkrijger/WALinuxAgent,thomas1206/WALinuxAgent,rjschwei/WALinuxAgent,fieryorc/WALinuxAgent