1. Added timeout tests in the LibraryController
2. Moved the default min and max processing time to the property-file
Corrected names of test-methods in LibraryControllerTest
Some minor corrections in the LibraryControllerTest
Added a BookLoanControllerTest - class for exercise2 + some minor improvements in the BookLoanController code base
Merge branch 'master' into solution2-callback

* master:
  Added a BookLoanControllerTest - class for exercise2 + some minor improvements in the BookLoanController code base
  Some minor corrections in the LibraryControllerTest
  Corrected names of test-methods in LibraryControllerTest
  1. Added timeout tests in the LibraryController 2. Moved the default min and max processing time to the property-file
Exercise2 - BookLoanController.java: Corrected formatting of the source code
Changes in common util classes
Common improvements of BookLoanController and its test-class
Solutions for exercise 2 - non-blocking-callback version of BookLoanController and test
Common improvements of BookLoanController test-class
Merge commit '9200db3bda87cc665a8eac4c865867df1173ed6d' into solution2-callback

* commit '9200db3bda87cc665a8eac4c865867df1173ed6d':
  Common improvements of BookLoanController test-class