Adding a default value in the generator does not update class or trait definition

[ClotildeToullec]

To reproduce:

• In a generator (ex: FamixTest6Generator), add a property to a class or trait

spam property: #isTasty type: #Boolean

• Generate

FamixTest6Generator generate

The property is created and declared in the definition of FamixTest6Spam.

• Back in the generator, add a default value:

spam property: #isTasty type: #Boolean defalutValue: true

• Generate again. The default value is visible in the getter but not in the class definition
  The test FmxMBGeneratorTest>>#testGeneratorsAreUpToDate

[ClotildeToullec]

The problem seems to be in the compiler.
We give a correct slot definition but the Opal compiler does not take it into account.

On our side: FmxMBRealRingEnvironment>>#collectChangesToApplyis correct: there is a change to apply on the slot.
We send its definition to the environment, it is still correct.

When it comes to OpalCompiler>>#evaluate, the change does not occur. No idea why, we need help from the Pharo team.

TODO: Work with the Pharo team (Marcus)