test(rxAge): Reverse functionality for rxAge to moment.

Closes #319
test(rxAge): Use demo-specific selector hook.
test(rxDiskSize): Disk size to Bytes or GB.

Closes #322
test(rxDiskSize): Use demo-specific selector hook.
Merge pull request #478 from rackerlabs/e2e-naturalize-getter-setters-rx-disk-size

E2e rx disk size
Merge pull request #477 from rackerlabs/e2e-natuarlize-getter-setters-rx-age

E2e rx age