This should prevent future regressions when compiling with "Unix
Makefiles" or others instead of ninja as the generator behind cmake.

This reverts commit 0df34af1.

 - the Jenkins slave now has the gdb server already started in the background

 - need to update to python3 coverage.py.

* refactor ekf analysis part 1: move plotting to functions

* add plot_check_flags plot function

* put plots in seperate file

* use object-oriented programming for plotting

* move functions for post processing and pdf report creation to new files

* add in_air_detector and description as a csv file

* refactor metrics and checks into separate functions

* refactor metrics into seperate file, seperate plotting

* ecl-ekf tools: re-structure folder and move results table generation

* ecl-ekf-tool: fix imports and test_results_table

* ecl-ekf tools: bugfix output observer tracking error plot

* ecl-ekf-tools: update batch processing to new api, fix exception handling

* ecl-ekf-tools: use correct in_air_detector

* ecl-ekf-tools: rename csv file containing the bare test results table

* ecl-tools: refactor for improving readability

* ecl-ekf tools: small plotting bugfixes

* ecl-ekf tools: small bugfixes in_air time, on_ground_trans, filenames

* ecl-ekf-tools: fix amber metric bug

* ecl-ekf-tools: remove custom function in inairdetector

* ecl-ekf-tools: remove import of pandas

* ecl-ekf-tools: add python interpreter to the script start

* ecl-ekf-tools pdf_report: fix python interpreter line

* px4-dev-ros-kinetic: update container tag to 2019-02-13

* ecl-ekf-tools python interpreter line: call python3 bin directly

* ecl-ekf-tools: change airtime from namedtuple to class for python 3.5

* ecl-ekf-tools: update docker image px4-dev-ros-kinetic

* ecl-ekf-tools: fix memory leak by correctly closing matplotlib figures

 - this updates all containers except for px4-dev-snapdragon

- waiting for https://github.com/PX4/Firmware/issues/11380

 - update navigator precision landing to build without multicopter

- the stackcheck build is too slow to be useful
- will be recreated with fmu-v5

* Jenkins: no SITL entrypoint for now
* Jenkins: complile - no snapdragon eagle entrypoint for now

 - Jenkins compile drop arch until container is updated and maintained
 - clang-tidy disable for now, the new version isn't respecting the existing configuration

 - these only run if code coverage is enabled