Upgrade to Gradle 5.6 (elastic#45005)

* Upgrade to Gradle 5.6.2

buildSrc/src/main/java/org/elasticsearch/gradle/EmptyDirTask.java

@@ -25,7 +25,7 @@
 import org.gradle.api.DefaultTask;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.TaskAction;
-import org.gradle.internal.nativeintegration.filesystem.Chmod;
+import org.gradle.internal.file.Chmod;
 
 /**
  * Creates an empty directory.

buildSrc/src/main/resources/minimumGradleVersion

@@ -1 +1 @@
-5.5
+5.6.2

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionSha256Sum=302b7df46730ce75c582542c056c9bf5cac2b94fbf2cc656d0e37e41e8a5d371
+distributionSha256Sum=027fdd265d277bae65a0d349b6b8da02135b0b8e14ba891e26281fa877fe37a2

gradlew

@@ -125,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`

settings.gradle

@@ -1,5 +1,3 @@
-import org.elasticsearch.gradle.Version
-
 String dirName = rootProject.projectDir.name
 rootProject.name = dirName