Updated input parameters and added jmxPasswordFilePath variable to in…

[Scharlotten]

…put files and updated nodetoolCredentials logic in the ds-collector bash script added the option to use the file

What this PR does:

Which issue(s) this PR fixes:
Fixes #

Checklist

• Automated Tests added/updated
• Documentation added/updated
• CLA Signed: DataStax CLA

[michaelsembwever]

this isn't needed, as that variable is not used inside collect-info.rs

[michaelsembwever]

this works for nodetool executions, but there are other places jmxPassword is used that will now not work (both in this script and in the rust file ds-collector/rust-commands/collect-info.rs).

so i think we still have to read and set jmxPassword
e.g.

Suggested change

	nodetoolCredentials="-u $jmxUsername -pwf $jmxPasswordFilePath"
	while IFS= read -r line; do
	# Skip empty lines
	[[ -z "$line" ]] && continue
	# Read first two fields from the line
	read -r _role _password <<< "$line"
	if [[ "${_role}" == "${jmxUsername}" ]]; then
	jmxPassword="${_password}"
	break
	fi
	done < "${jmxPasswordFilePath}"
	nodetoolCredentials="-u $jmxUsername -pwf $jmxPasswordFilePath"

[michaelsembwever]

i couldn't push to your fork @Scharlotten , so i've updated this PR here: #190

[michaelsembwever]

merged in 87b1072