chore: Downgrade to JDK 17 (#8)

## **Associated JIRA tasks**

.

## **What the code does.**

Downgrade to JDK 17

## **Does this code change break backwards compatibility?.**

No

.github/workflows/java-test.yml

@@ -0,0 +1,47 @@
+name: Java SDK Build JDK21
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+env:
+  GITHUB_ACTOR: ${{ github.actor }}
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  GITHUB_REPOSITORY: ${{ github.repository }}
+jobs:
+  validation:
+    name: "gradle-wrapper-validation"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: gradle/actions/wrapper-validation@v3
+
+  build:
+    needs:
+      - validation
+    runs-on: ubuntu-latest
+    env:
+      ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.ORG_GRADLE_PROJECT_mavenCentralUsername }}
+      ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.ORG_GRADLE_PROJECT_mavenCentralPassword }}
+      ORG_GRADLE_PROJECT_signingInMemoryKeyId: ${{ secrets.ORG_GRADLE_PROJECT_signingInMemoryKeyId }}
+      ORG_GRADLE_PROJECT_signingInMemoryKeyPassword: ${{ secrets.ORG_GRADLE_PROJECT_signingInMemoryKeyPassword }}
+      ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.ORG_GRADLE_PROJECT_signingInMemoryKey }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Checkout proto repository
+        run: |
+          git clone https://github.com/KodyPay/kp-protocols-clientsdk.git proto-repo
+          mv proto-repo/src .
+          rm -r proto-repo
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'adopt'
+      - name: Setup & Build Gradle
+        uses: gradle/actions/setup-gradle@v3
+        with:
+          arguments: build -s --scan -Pversion=${{ needs.tagging.outputs.version }}

build.gradle.kts

@@ -23,7 +23,7 @@ repositories {
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(21))
+        languageVersion.set(JavaLanguageVersion.of(17))
         vendor.set(JvmVendorSpec.ADOPTIUM)
     }
 }
@@ -91,4 +91,4 @@ mavenPublishing {
 tasks.withType<PublishToMavenRepository> {
     mustRunAfter(rootProject.tasks.findByName("release"))
     rootProject.tasks.findByName("postRelease")?.dependsOn(this)
-}
+}