Allow custom bean name generator for repository

[m-balakhontsev]

Previous issue #262 with PR was closed in favour of the #1931 as a solution.

While #1931 allows to set BeanNameGenerator globally, as far as I see, still there is no opportunity to change bean name generation only for specified jpa-repositories without changing behaviour of bean name generation for any other beans.

[mp911de]

With @Enable…Repositories being a variant of @ComponentScan, we should consider similar configuration options. Right now I see that we could benefit from the following ones:

• nameGenerator (as mentioned by this ticket)
• lazyInit

[mp911de]

With our support for bootstrapMode we do not require lazyInit as the bootstrap mode has multiple options.