MAINT: remove AWIBoxLoan stuff

src/main/java/caosdb/server/CaosAuthenticator.java

src/main/java/caosdb/server/CaosDBServer.java

...java/caosdb/server/accessControl/AuthenticationUtils.java

...osdb/server/accessControl/OneTimeAuthenticationToken.java

src/main/java/caosdb/server/accessControl/UserSources.java

src/main/java/caosdb/server/jobs/extension/AWIBoxLoan.java

.../caosdb/server/jobs/extension/AWIBoxLoanCuratorEmail.java

...in/java/caosdb/server/jobs/extension/AWIBoxLoanModel.java

...ver/jobs/extension/AWIBoxLoanRequestLoanCuratorEmail.java

...r/jobs/extension/AWIBoxLoanRequestReturnCuratorEmail.java

src/main/java/caosdb/server/permissions/EntityACL.java

src/main/java/caosdb/server/transaction/Transaction.java

...est/java/caosdb/server/jobs/extension/TestAWIBoxLoan.java

src/test/java/caosdb/server/permissions/EntityACLTest.java

...st/java/caosdb/server/resource/TestScriptingResource.java