With recent change to introduce a sandesh logger for logging sandesh
messages and libsandesh messages and setting the log level of the
logger based on the logging level set by libsandesh user calling
SetLoggingParams()/SetLoggingLevel(), the log level of the sandesh
level was getting set to debug as default for UT_XXX and to all for
INVALID. Trace sandesh has logging level set to INVALID and hence the
trace would not show up in unit tests. Fix is to set the log level of the
sandesh logger to all log by default for UT_XXX and INVALID.
Closes-Bug: #1389029

Change-Id: Ia3eaf961413594b4138ed886e0b74711dbb52e49