Bug - Table - 6.3.0 prerelease issues

[dlabrecq]

Encountered a couple issues with react-table 6.3.0-prerelease.29.

• Required to add isExpandable attribute to Table and Tr elements
• Must to omit child Tr elements when row is not expanded
• Using isExpanded attribute with Tbody doesn't appear to have any effect
• Rows are created dynamically for the example below, so it's difficult to set isExpanded on the parent Tbody
• The first row's dividing line disappears when expanded

See refactored table code here:
https://github.com/project-koku/koku-ui/pull/4347/files#diff-8150ef9b66bf5f75d4cba2d18462f2ee4fd367fb043e3336d0c1db9c066792daR114

Example of missing row dividing line:

Related PRs:
#11815
#11865