TE-468 JS test: Use the correct array for validating onSeek logs

This particular test is failing in Solano workers; there the log
is written in a different order, which was causing objects not to
be found.
Merge pull request #5175 from edx/benp/solano2-jstest-failure

TE-468 JS test: Use the correct array for validating onSeek logs
Video link obfuscation. [BLD-1230]