logger: Fixing the bug with redirecting of log output to the standard error

Change-Id: I4f84548643a4ea3b0b1ef8f341e39d01e90eb55b
tests: Improving ManagementTool test suite and fixing discovered bugs

Change-Id: I1c7e51cf105544325657825474f9ee85d61396ed
Refs: #2226
ndns-dig: adapt to the fact that NDN testbed does not have root zone

- Enable dig to set the start label during iterative process.
- Enable validation of intermediate results with an option to disable
it

Change-Id: I221e3c328c875ad06a1f8094f1004e68d9d46a57
tools: Fix issues with ndns-dig

- Handle the case when validator.conf is not present and anchors cannot
  be found (default path for anchor lookups is $SYSCONFDIR/ndns)

- Abort ndns-dig when positional parameters are omitted

refs: #2276

Change-Id: Id70d4b219254f5b221990a38d41471b920aa1521
ndns-update: load Response from file directly

- also fix the bug that ndns-update segfaults when running without
parameters

Change-Id: I65a741e845d44d14aa29b2814c6616d27dc0a12a
Refs: #2255, #2273
tools: add ndns-demo

Change-Id: I250d7bf8a02ffec8aee3226bbf830bc3e9bbfa3f
tools: add NdnsShot

Change-Id: Ia34e0228e6e9164239f3412e5c419f965e35daec
add root cert and shell script to simplify testing

Change-Id: I15171cf06f3b9b3e55909109a3bf99d2d6176a35