Update mockito usage (#422)

* test build against jdk 17

* Stop using deprecated initMock method

.github/workflows/build-maven.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 11, 16 ]
+        java: [ 11, 16, 17-ea ]
     steps:
       - uses: actions/checkout@v2
       - name: setup-jdk-${{ matrix.java }}

builder/src/test/java/net/kemitix/checkstyle/ruleset/builder/ReadmeBuilderTest.java

@@ -18,8 +18,8 @@ public class ReadmeBuilderTest {
     private String template = "i:%s,ec:%s,es:%s,dc:%s,ds:%s";
 
     @BeforeEach
-    public void setUp() {
-        MockitoAnnotations.initMocks(this);
+    public void setUp() throws Exception {
+        MockitoAnnotations.openMocks(this).close();
 
         readmeBuilder = new ReadmeBuilder(indexBuilder, ruleLoader);
     }

builder/src/test/java/net/kemitix/checkstyle/ruleset/builder/ReadmeWriterTest.java

@@ -41,8 +41,8 @@ public class ReadmeWriterTest {
     private String formattedOutput = UUID.randomUUID().toString();
 
     @BeforeEach
-    public void setUp() throws IOException {
-        MockitoAnnotations.initMocks(this);
+    public void setUp() throws Exception {
+        MockitoAnnotations.openMocks(this).close();
 
         readmeWriter =
                 new ReadmeWriter(templateProperties, outputProperties,

builder/src/test/java/net/kemitix/checkstyle/ruleset/builder/RuleLoaderTest.java

@@ -45,8 +45,8 @@ public class RuleLoaderTest {
     private String disabledRuleName = "disabled-" + UUID.randomUUID().toString();
 
     @BeforeEach
-    public void setUp() {
-        MockitoAnnotations.initMocks(this);
+    public void setUp() throws Exception {
+        MockitoAnnotations.openMocks(this).close();
 
         ruleLoader =
                 new RuleLoader(