Rename implement to expectedBy in Gradle, deprecate the old name

Issue #KT-20618 Fixed

(cherry picked from commit 6e0d378)

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/KotlinGradlePluginIT.kt

@@ -20,6 +20,7 @@ import org.gradle.api.logging.LogLevel
 import com.intellij.openapi.util.io.FileUtil
 import org.jetbrains.kotlin.gradle.plugin.CopyClassesToJavaOutputStatus
 import org.jetbrains.kotlin.gradle.tasks.USING_INCREMENTAL_COMPILATION_MESSAGE
+import org.jetbrains.kotlin.gradle.plugin.IMPLEMENT_CONFIG_WARNING
 import org.jetbrains.kotlin.gradle.util.*
 import org.junit.Test
 import java.io.File
@@ -406,6 +407,26 @@ class KotlinGradleIT: BaseGradleIT() {
         }
     }
 
+    @Test
+    fun testDeprecatedImplementWarning() {
+        val project = Project("multiplatformProject", GRADLE_VERSION)
+        val warningText = IMPLEMENT_CONFIG_WARNING
+
+        project.build("build") {
+            assertSuccessful()
+            assertNotContains(warningText)
+        }
+
+        project.projectDir.walk().filter { it.name == "build.gradle" }.forEach { buildGradle ->
+            buildGradle.modify { it.replace("expectedBy", "implement") }
+        }
+
+        project.build("build") {
+            assertSuccessful()
+            assertContains(warningText)
+        }
+    }
+
     @Test
     fun testFreeCompilerArgs() {
         val project = Project("kotlinProject", GRADLE_VERSION)

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/multiplatformProject/libJs/build.gradle

@@ -1,5 +1,5 @@
 apply plugin: 'kotlin-platform-js'
 
 dependencies {
-    implement project(":lib")
+    expectedBy project(":lib")
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/multiplatformProject/libJvm/build.gradle

@@ -1,6 +1,6 @@
 apply plugin: 'kotlin-platform-jvm'
 
 dependencies {
-    implement project(":lib")
+    expectedBy project(":lib")
     compile 'com.google.guava:guava:20.0'
 }