fixed bug with Python 2.7 installation and added a few new productivity functions

• V1.11.4
  • fixed problem when ck-python.cfg contains non-existent python
  • fixed problem with allowed action_names (should not start with number but can have numbers in the middle)
  • fixed problem with ElasticSearch when renaming entries
  • Added key "use_git_instead_of_https" to kernel cfg to substitute https:// with git@ in repositories
  • fixed problem with pip installation using Python 2.7 (thanks to @alered01 from Arm)
  • added possibility to log all used CK entries to find out all dependencies
    turn on: ck set kernel --var.log_ck_entries={file}
    turn off: ck set kernel --var.log_ck_entries=""