Remove lsblk dependencies from IT test definitions

CIP-Core now contains lsblk. The version of lsblk is different to that included in the integration tests. This means that there is version incompatibility between the lsblk libraries added as part of the tests, and the version of lsblk installed. However, not all filesystems used for testing may have lsblk installed.

This commit adds a script that checks for the presence of lsblk, and only installs the prebuilt lsblk if the tool isn't already installed on the OS.