Update to Spring Boot 2.7.18 (#474)

* Update to Spring Boot 2.7.18

https://spring.io/blog/2023/11/23/spring-boot-2-7-18-available-now

* Update to Gradle 8.7

This fixes Gradle on Java 21, which is used in the Dev Container.

* Fix Mockito imports

`org.mockito.Matchers` was deprecated and removed in favour of
`org.mockito.ArgumentMatchers`.

* Fix Gradle JaCoCo configuration

.github/workflows/docker.yml

@@ -34,7 +34,7 @@ jobs:
     - name: Run a build and generate the dependency graph which will be submitted post-job
       run: ./gradlew build
     - name: Test Coverage
-      run: ./gradlew jacocoTestReport jacocoFix --scan
+      run: ./gradlew jacocoTestReport
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v3
       with:

build.gradle

@@ -1,8 +1,7 @@
 buildscript {
     ext {
-        springBootVersion = '2.5.15'
+        springBootVersion = '2.7.18'
     }
-    ext['log4j2.version'] = '2.17.2'
     repositories {
         mavenCentral()
     }
@@ -105,24 +104,6 @@ dependencies {
     implementation 'org.javatuples:javatuples:1.2'
 }
 
-jacocoTestReport {
-    reports {
-        xml.required = true
-        html.required = false
-    }
-}
-
-task jacocoFix(type: Copy) {
-    from 'build/reports/jacoco/test/jacocoTestReport.xml'
-    into './src/main/java/'
-    rename { String fileName ->
-        fileName.replace("jacocoTestReport.xml", "jacoco.xml")
-    }
-}
-
 test {
     maxHeapSize = "4096m"
 }
-
-
-check.dependsOn jacocoTestReport

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
-#Fri Sep 17 19:04:36 CEST 2021
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-all.zip
 distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-all.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists