Upgrade to Coroutines 1.2.0-alpha

This commit also switches on kotlin-compiler-embeddable to
improve isolation of its dependencies

See gh-19975

build.gradle

@@ -29,7 +29,7 @@ ext {
 	}
 
 	aspectjVersion       = "1.9.2"
-	coroutinesVersion    = "1.1.1"
+	coroutinesVersion    = "1.2.0-alpha"
 	freemarkerVersion    = "2.3.28"
 	groovyVersion        = "2.5.6"
 	hsqldbVersion        = "2.4.1"

spring-webflux/spring-webflux.gradle

@@ -58,7 +58,7 @@ dependencies {
 	testCompile("org.jetbrains.kotlin:kotlin-script-runtime:${kotlinVersion}")
 	testCompile(project(":spring-core-coroutines"))
 	testRuntime("org.jetbrains.kotlin:kotlin-script-util:${kotlinVersion}")
-	testRuntime("org.jetbrains.kotlin:kotlin-compiler:${kotlinVersion}")
+	testRuntime("org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}")
 	testRuntime("org.jruby:jruby:9.2.6.0")
 	testRuntime("org.python:jython-standalone:2.7.1")
 	testRuntime("org.synchronoss.cloud:nio-multipart-parser:1.1.0")

spring-webmvc/spring-webmvc.gradle

@@ -73,7 +73,7 @@ dependencies {
 	testCompile("io.reactivex.rxjava2:rxjava:${rxjava2Version}")
 	testCompile("org.jetbrains.kotlin:kotlin-script-runtime:${kotlinVersion}")
 	testRuntime("org.jetbrains.kotlin:kotlin-script-util:${kotlinVersion}")
-	testRuntime("org.jetbrains.kotlin:kotlin-compiler:${kotlinVersion}")
+	testRuntime("org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}")
 	testRuntime("org.jruby:jruby:9.2.6.0")
 	testRuntime("org.python:jython-standalone:2.7.1")
 	testRuntime("org.webjars:underscorejs:1.8.3")