Merge branch 'master' into 'tibor'

# Conflicts:
#   src/main/kotlin/com/aitrainer/api/controller/CustomerController.kt
#   src/test/kotlin/com/aitrainer/api/test/CustomerTests.kt

src/main/kotlin/com/aitrainer/api/controller/CustomerController.kt

@@ -94,7 +94,7 @@ class CustomerController ( private val customerRepository: CustomerRepository) {
 
         val password: String? = newCustomer.password
         val updatedCustomer: Customer
-        if ( password == null || password.isEmpty() ) {
+        if ( password == null || password.length == 0 ) {
             updatedCustomer =
             returnCustomer.copy(
                     name = newCustomer.name,