Upgrade to Hamcrest 2.1

Closes gh-23467

build.gradle

@@ -143,7 +143,7 @@ configure(allprojects) { project ->
 		}
 		testCompile("org.mockito:mockito-junit-jupiter:3.0.0")
 		testCompile("io.mockk:mockk:1.9.3")
-		testCompile("org.hamcrest:hamcrest-all:1.3")
+		testCompile("org.hamcrest:hamcrest:2.1")
 		testCompile("org.assertj:assertj-core:3.13.1")
 		// Pull in the latest JUnit 5 Launcher API to ensure proper support in IDEs.
 		testRuntime("org.junit.platform:junit-platform-launcher")

spring-test/spring-test.gradle

@@ -27,12 +27,14 @@ dependencies {
 	optional("javax.servlet.jsp.jstl:javax.servlet.jsp.jstl-api:1.2.1")
 	optional("javax.xml.bind:jaxb-api:2.3.1")
 	optional("javax.websocket:javax.websocket-api:1.1")
-	optional("junit:junit:4.13-beta-3")
+	optional("junit:junit:4.13-beta-3") {
+		exclude group: "org.hamcrest", module: "hamcrest-core"
+	}
 	optional("org.junit.jupiter:junit-jupiter-api")
 	optional("org.testng:testng:6.14.3")
 	optional("org.aspectj:aspectjweaver:${aspectjVersion}")
 	optional("org.codehaus.groovy:groovy:${groovyVersion}")
-	optional("org.hamcrest:hamcrest-core:1.3")
+	optional("org.hamcrest:hamcrest:2.1")
 	optional("org.apache.taglibs:taglibs-standard-jstlel:1.2.5") {
 		exclude group: "org.apache.taglibs", module: "taglibs-standard-spec"
 	}
@@ -46,7 +48,9 @@ dependencies {
 		exclude group: "commons-logging", module: "commons-logging"
 		exclude group: "io.netty", module: "netty"
 	}
-	optional("org.xmlunit:xmlunit-matchers:2.6.2")
+	optional("org.xmlunit:xmlunit-matchers:2.6.2") {
+		exclude group: "org.hamcrest", module: "hamcrest-core"
+	}
 	optional("org.skyscreamer:jsonassert:1.5.0")
 	optional("com.jayway.jsonpath:json-path:2.4.0")
 	optional("org.jetbrains.kotlin:kotlin-reflect")
@@ -63,7 +67,9 @@ dependencies {
 	testCompile("javax.mail:javax.mail-api:1.6.2")
 	testCompile("org.hibernate:hibernate-core:5.4.3.Final")
 	testCompile("org.hibernate:hibernate-validator:6.0.17.Final")
-	testCompile("org.junit.platform:junit-platform-runner")
+	testCompile("org.junit.platform:junit-platform-runner") {
+		exclude group: "junit", module: "junit"
+	}
 	testCompile("org.junit.platform:junit-platform-testkit")
 	testCompile("org.junit.jupiter:junit-jupiter-params")
 	testCompile("com.fasterxml.jackson.core:jackson-databind:${jackson2Version}")
@@ -77,9 +83,13 @@ dependencies {
 		exclude group: "commons-logging", module: "commons-logging"
 	}
 	testCompile("io.projectreactor.netty:reactor-netty")
-	testCompile("de.bechte.junit:junit-hierarchicalcontextrunner:4.12.1")
+	testCompile("de.bechte.junit:junit-hierarchicalcontextrunner:4.12.1") {
+		exclude group: "junit", module: "junit"
+	}
 	testRuntime("org.junit.jupiter:junit-jupiter-engine")
-	testRuntime("org.junit.vintage:junit-vintage-engine")
+	testRuntime("org.junit.vintage:junit-vintage-engine") {
+		exclude group: "junit", module: "junit"
+	}
 	testRuntime("org.glassfish:javax.el:3.0.1-b08")
 	testRuntime("com.sun.xml.bind:jaxb-core:2.3.0.1")
 	testRuntime("com.sun.xml.bind:jaxb-impl:2.3.0.1")