[#6] - rosv7 export changes (#7)

* rosv7: updated export command to include sensitive information in the export backup
* ci:    added test with qemu-system-x86 for real testing on CHRs
* test:  added tests for backup process, including sensitive and non-sensitive values, as well as logfile records

basic refactoring (#3)

* basic refactoring
* fix shellcheck
* add github workflow for shellcheck
* style fix
* get rid of SSH_OPT; please use ~/.ssh/config
* remove travis
* add badges
* add check for chown/mkdir/chmod
* remove useless utils
* remove set ntp code