Fix CI (follow-up to #443)

Author: swallez

.ci/Dockerfile

@@ -20,7 +20,7 @@
 # Build a Docker image that has Gradle and all project dependencies ready.
 # Needs to be run with .git and java-client/src mounted under /elasticsearch-java.
 
-FROM openjdk:15
+FROM openjdk:17
 
 # Default UID/GID to 1000
 # it can be overridden at build time

buildSrc/build.gradle.kts

@@ -18,9 +18,9 @@
  */
 
 dependencies {
-    implementation("org.ajoberstar.grgit:grgit-gradle:4.0.1")
+    implementation("org.ajoberstar.grgit:grgit-gradle:5.0.0")
 }
 
 repositories {
-    maven("https://plugins.gradle.org/m2/")
+    mavenCentral()
 }

java-client/build.gradle.kts

@@ -93,6 +93,7 @@ tasks.withType<Javadoc> {
     // Gradle calls javadoc with a list of file and not a path. This prevents doc-files from being copied.
     opt.addStringOption("sourcepath", project.projectDir.path + "/src/main/java")
     opt.docFilesSubDirs(true)
+    opt.addBooleanOption("Xdoclint:-missing", true)
 
     doLast {
         // Javadoc adds its decoration to html doc files, including quite some JS. This slows down the api spec