Convert string bolean values to boolean data types

[sgruber-seibert]

When variables are read from a csv file, the values are read as strings. When variables are read from a CSV file, the values are read as strings. This may cause unexpected behavior because any non-empty string is "True" in Python.

Example:

x = "False"
if x is True:
    print(x)

This PR converts string values "true" and "false" (case-insensitive) to actual booleans when reading from CSV, so that they behave as expected in conditions.

[sschmachtel]

What about variable from other points
like

• test=remote@target: echo "True"
  Is this also supported?

[sgruber-seibert]

What about variable from other points like

• test=remote@target: echo "True"
  Is this also supported?

This is currently not supported.

[sgruber-seibert]

What about variable from other points like

• test=remote@target: echo "True"
  Is this also supported?

Now it will casts string bools from cli, local and remote commands as boolean data types.

[sschmachtel]

Looks good to me now :-)