Correct all shellcheck "errors" and "warnings" for
/usr/local/bin/* shell scripts.
This is necesary to have Jenkins start publishing test results.
All code worked on nodes but pushed to strict posix compliance
as part of the cleanup.
SC1001,SC2002,SC2004,SC2006,SC2034,SC2039,SC2086,SC2155
https://github.com/koalaman/shellcheck/wiki for more info
Change-Id: If1f27381eedae79087e490ea12f5939f8cc525a0