Fix test filtering

This releases fixes a problem with broadcasting the --contains command-line argument (which is used for running only a subset set of a tests). The fix involves each image getting the search string from the command-line instead of only image 1 getting the string and broadcasting it to the other images, which do not know a priori the length of string to allocate for receiving the broadcast.

What's Changed

• (fix): Fix bug related to assigning to an unallocated variable by @ktras in #76

Full Changelog: 2.4.0...2.4.1