Deprecate Spring support

[fmbenhassine]

Spring support (through the EnhancedRandomFactoryBean) has been a constant maintenance burden: dependency updates, making sure parameters are in sync between EnhancedRandomFactoryBean and EnhancedRandomParameters (which are not in sync BTW today..), documentation updates, etc.

In hindsight, the EnhancedRandomFactoryBean has no real added value since EnhancedRandom can be declared as a bean in a spring context with the static method random used as a factory method. If custom parameters are needed, the EnhancedRandomFactoryBean can be copied in the project that needs it.

Spring support will be deprecated in v3.8 and removed in v4.0.