Add a hash character in the first line of parameter txt files

[OmerFI]

Added a hash character which is a comment character in some languages.

Why?

If a developer wants to load parameters in txt files, the developer can easily exclude the lines that start with a hash character.

For example, in Python, the developer can write something like this:

with open("lfi-parameters.txt") as f:
    for line in f:
        line = line.strip()
        if line.startswith("#") or line == "":
            continue
        print(line)

Another solution is to exclude the first two lines, but I think it is better to use a comment character in txt files and exclude the lines that start with it.