Require either BuildPlugin or StandaloneTestBasePlugin to use RestTestPlugin

It used to be that RestTestPlugin "came with" StandaloneTestBasePlugin
but we'd like to use it with BuildPlugin for the high level rest client.

Also fix some license headers.

Original commit: elastic/x-pack-elasticsearch@3d5549d170

qa/audit-tests/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {
@@ -32,4 +33,3 @@ integTest {
     }
   }
 }
-

qa/core-rest-tests-with-security/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {

qa/reindex-tests-with-security/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {

qa/security-client-tests/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {
@@ -33,4 +34,3 @@ integTest {
     }
   }
 }
-

qa/security-migrate-tests/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {

qa/smoke-test-graph-with-security/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {
@@ -35,4 +36,3 @@ integTest {
     }
   }
 }
-

qa/smoke-test-monitoring-with-security/build.gradle

@@ -1,4 +1,5 @@
 subprojects {
+  apply plugin: 'elasticsearch.standalone-test'
   apply plugin: 'elasticsearch.rest-test'
 
   dependencies {
@@ -47,4 +48,3 @@ subprojects {
 task integTest {
   dependsOn subprojects.integTest
 }
-

qa/smoke-test-plugins-ssl/build.gradle

@@ -10,6 +10,7 @@ import java.nio.charset.StandardCharsets
 import java.security.KeyStore
 import java.security.SecureRandom
 
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {
@@ -398,4 +399,3 @@ class SanEvaluator {
     return buf.toString();
   }
 }
-

qa/smoke-test-plugins/build.gradle

@@ -1,5 +1,6 @@
 import org.elasticsearch.gradle.MavenFilteringHack
 
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {
@@ -30,7 +31,7 @@ integTest {
       return tmpFile.exists()
     }
   }
-} 
+}
 
 ext.expansions = [
   'expected.plugins.count': pluginsCount
@@ -40,4 +41,3 @@ processTestResources {
   inputs.properties(expansions)
   MavenFilteringHack.filter(it, expansions)
 }
-

qa/smoke-test-security-with-mustache/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {

qa/smoke-test-watcher-with-mustache/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {

qa/smoke-test-watcher-with-painless/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {

qa/smoke-test-watcher-with-security/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {
@@ -38,4 +39,3 @@ integTest {
     }
   }
 }
-

qa/smoke-test-watcher/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {

qa/tribe-tests-with-license/build.gradle

@@ -2,6 +2,7 @@ import org.elasticsearch.gradle.test.ClusterConfiguration
 import org.elasticsearch.gradle.test.ClusterFormationTasks
 import org.elasticsearch.gradle.test.NodeInfo
 
+apply plugin: 'elasticsearch.standalone-test'
 apply plugin: 'elasticsearch.rest-test'
 
 dependencies {
@@ -79,4 +80,4 @@ integTest {
     // need to kill the standalone nodes here
     finalizedBy 'setupClusterOne#stop'
     finalizedBy 'setupClusterTwo#stop'
-}
+}