Improve performance of Energy Storage System Power-Solver

[sfeilmeier]

• If Symmetric-Mode is activated in the config (=default), all L1, L2 and L3 coefficients are dropped now

• Improve perfomance of "ReudeNumberOfUsedInverters" optimizer by applying an algorithm similar to binary tree search

• Restructure file hierarchy. Reduce file lengths and use functional interfaces or static methods were appropriate

• JUnit tests:

  • Add JUnit tests (coverage 84,8 %)
  • Use OpenEMS Unit-Test framework and existing Dummy implementations where possible

• Also in this commit:

  • improve Checkstyle check for Javadoc
  • Add/rename generic functional interfaces that throw exceptions: ThrowingBiConsumer, ThrowingBiFunction, ThrowingConsumer, ThrowingFunction, ThrowingRunnable, ThrowingSupplier
  • Core.Cycle trigger config update on modified
  • Core.Cycle Worker: measure real Cycle-Time. If it is shorter than the configured Cycle-Time, the remaining time is spent 'spleeping'