Merge branch 'release/0.2.1' into develop

* release/0.2.1:
  Fix hakabana path in the workshop
  Small fixes on hakabana workshop
  Add hakabana exercises to workshop
  Move hakabench install dest
  Fix code block highlighting in doc
  Add test for elasticsearch in cmake
  Fix library link private/public cmake flag
  Update doc with elasticsearch and kibana setup
  Fix private link library
  Add missing dependency against libhaka
  Add proper version to lib elasticsearch
  Update version number
Add profiling tool to hakabench
Add -r option in hakabench to force repeat count
Add hakabench to PATH for localinstall
Use hakabench and haka from pretests install

Allow to copy/paste executed command to test again without having to source
out/env.sh
Add capture only benchmark test files
Split capture bench test into big and small packets
Use udp big packet for capture-big bench test
Tune repeat count for benchmark

1000 seems to be fast enought on our dev computer and in the same time long
enought to have stable result
Add packet count to hakabanch
Fix hakabench help
Fix -o option on hakabanch
Use cursor save/restore escape code for hakabench output
Fix repeat again

Target is that test run in less than 10 seconds but having results as stables as
possible
Merge branch 'feature/haka-profiling' into develop
Fix elasticsearch post thread creation

On heavy load we were creating multiple post thread
Fix bench target
Improve benchmark module

The speed was not computed right if in the test the packets were not
accepted nor dropped.
Fix CMake Find modules

find_package_handle_standard_args handle _FOUND variable but it have to be given
the exact (case sensitive) module name
Fix missuse of (sometime wrapped) call to fprintf

Fix compilation on newer gcc (-Werror=format-security)