Merge tag 'v2.5.6'

v2.5.6
lb: update the usage of workspace and juggler API

Use `model.properties.create()` to add properties to a model.

Use `err.details.context` and `err.details.codes` when printing
ValidationError.
Merge pull request #144 from strongloop/feature/fix-lb-model

lb: update the usage of workspace and juggler API
v2.5.7
Merge branch 'release/2.5.7' into production