Tab completion may fail with lazy initialization

[icodening]

tab-completion fails when spring.main.lazy-initialization=true, and will not found ValueProvider

spring.main.lazy-initialization=true

spring.main.lazy-initialization=false

[jvalkeal]

I'll see where the PR should be backported.

[jvalkeal]

There's some tech dept in old code which ultimately caused this. PR should be a good short term fix. I'll create new issues to change how this part of a completion should behave.