Upgrade to JDK 17

build.gradle

@@ -59,7 +59,7 @@ plugins {
     id 'com.github.jk1.dependency-license-report' version '2.0' apply false
     id 'org.openapi.generator' version '4.3.1' apply false
     id 'org.zeroturnaround.gradle.jrebel' version '1.1.11' apply false
-    id 'org.springframework.boot' version '2.6.0' apply false
+    id 'org.springframework.boot' version '2.6.1' apply false
     id 'net.ltgt.errorprone' version '2.0.2' apply false
     id 'io.swagger.core.v3.swagger-gradle-plugin' version '2.1.11' apply false
     id 'com.gorylenko.gradle-git-properties' version '2.3.1' apply false
@@ -109,7 +109,7 @@ allprojects  {
     dependencyManagement {
         imports {
             mavenBom 'org.springframework:spring-framework-bom:5.3.12'
-            mavenBom 'org.springframework.boot:spring-boot-dependencies:2.6.0'
+            mavenBom 'org.springframework.boot:spring-boot-dependencies:2.6.1'
             mavenBom 'org.junit:junit-bom:5.8.1'
         }
 
@@ -149,7 +149,7 @@ allprojects  {
             dependency 'org.mock-server:mockserver-junit-jupiter:5.11.2'
             dependency 'org.webjars.npm:swagger-ui-dist:4.0.1'
             dependency 'org.webjars:webjars-locator-core:0.48'
-            dependency 'org.springframework.boot:spring-boot-starter-mail:2.6.0'
+            dependency 'org.springframework.boot:spring-boot-starter-mail:2.6.1'
             dependency 'com.icegreen:greenmail-junit5:1.6.5'
 
             // fineract client dependencies
@@ -379,9 +379,9 @@ configure(project.fineractJavaProjects) {
     apply plugin: 'com.github.andygoossens.modernizer'
 
     /* define the valid syntax level for source files */
-    sourceCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_17
     /* define binary compatibility version */
-    targetCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_17
 
     /* http://stackoverflow.com/questions/19653311/jpa-repository-works-in-idea-and-production-but-not-in-gradle */
     sourceSets.main.output.resourcesDir = sourceSets.main.java.outputDir