(fix)resource-chaoslib: run command with a shell instance #81
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Modify the resource (cpu, memory) chaoslib to read commands from the command_string operand instead of from the standard input while performing the exec operation.
This should help make the command execution more predictable as we force execution with /bin/sh regardless of entrypoint.
Towards fix: CPU hog experiment fails to inject chaos litmus#1861
Again, these still apply only to target containers that offer a shell.
Signed-off-by: ksatchit karthik.s@mayadata.io