Skip execInContainer(...) null or empty command parts.

[bedla]

Hi,
I have added this small tweak to help with null or empty values in command array when calling execInContainer(...) method.
This will help me (and others), to write more concise code like this:

minioContainer.execInContainer(
            "mc", debug(),
            "mb", "--region=eu-central-1",
            "$alias/mynewbucket"
        ).requireSuccess()
            .also { println(it) }

        private fun debug() = if (false) {
            "--debug"
        } else {
            null
        }

Instead of creating another array to be able to IF values:

        String[] command1 = new String[5];
        command1[0] = "mc";
        command1[1] = debug();
        command1[2] = "mb";
        command1[3] = "--region=eu-central-1";
        command1[4] = "$alias/mynewbucket";

        String[] command2 = new String[]{"mc", debug(), "mb", "--region=eu-central-1", "$alias/mynewbucket"};
        minioContainer.execInContainer(command1);

What do you think?

Thx

Ivos