Add error exitcode to runtestsx.sh

Update Change log, set version number to 3.0.8

updated exposure value description

Merge branch 'master' of https://github.com/OasisLMF/ktools

Update changelog and version number

Inc version number

Merge branch 'master' of https://github.com/OasisLMF/ktools

code to trap memory allocation errors before cgroup kills the processes

Updated version to 3.0.1

Updated version to 3.0.0