release: Update package.xml version to 2.6.6

7 jobs for master in 10 minutes and 43 seconds (queued for 1 second)
Name Stage Failure
failed
robotpkg-py-eigenpy-16.04 Test
Total Test time (real) =   0.25 sec

The following tests FAILED:
21 - py-MINRES (Failed)
Errors while running CTest
Makefile:85: recipe for target 'test' failed
make: *** [test] Error 8
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
format Test
./benchmarks/bench-switch.py:6:1: F401 'time' imported but unused
./benchmarks/bench-switch.py:7:1: F401 'timeit' imported but unused
./benchmarks/bench-switch.py:53:24: E703 statement ends with a semicolon
./python/eigenpy/__init__.py:17:1: F403 'from .eigenpy import *' used; unable to detect undefined names
./python/eigenpy/__init__.py:17:1: F401 '.eigenpy.*' imported but unused
./python/eigenpy/__init__.py:18:1: F401 '.eigenpy.__version__' imported but unused
./python/eigenpy/__init__.py:18:1: F401 '.eigenpy.__raw_version__' imported but unused
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
robotpkg-py-eigenpy-ferrum Test
Total Test time (real) =   0.31 sec

The following tests FAILED:
21 - py-MINRES (Failed)
Errors while running CTest
Makefile:128: recipe for target 'test' failed
make: *** [test] Error 8
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1