Reset mocks only when testContext.hasApplicationContext

[seregamorph]

If Spring fails to create application context, it does not make sense to reset Mocks discovered in the BeanFactory.
Moreover, these failures are too verbose and hide the original failure message which is above in the test log output.
Sample failure on afterTest which does not bring value:

java.lang.IllegalStateException: ApplicationContext failure threshold (1) exceeded: 
skipping repeated attempt to load context for [WebMergedContextConfiguration@52b2c255 testClass = projects.pt.server.publicapi.controllers.BoardsControllerIT, locations = [], classes = [projects.pt.server.publicapi.controllers.BoardsController, projects.pt.server.publicapi.errorhandlers.CustomRestExceptionHandler], contextInitializerClasses = [], activeProfiles = [], propertySourceDescriptors = [], propertySourceProperties = ["org.springframework.boot.webmvc.test.autoconfigure.WebMvcTestContextBootstrapper=true"], contextCustomizers = ...
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:157)
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:128)
	at org.springframework.test.context.bean.override.mockito.MockitoResetTestExecutionListener.afterTestMethod(MockitoResetTestExecutionListener.java:103)
	at org.springframework.test.context.TestContextManager.afterTestMethod(TestContextManager.java:488)
	at org.springframework.test.context.testng.AbstractTestNGSpringContextTests.springTestContextAfterTestMethod(AbstractTestNGSpringContextTests.java:183)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.testng.internal.invokers.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:141)
	at org.testng.internal.invokers.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:71)
	at org.testng.internal.invokers.ConfigInvoker.invokeConfigurationMethod(ConfigInvoker.java:400)
	at org.testng.internal.invokers.ConfigInvoker.invokeConfigurations(ConfigInvoker.java:333)
	at org.testng.internal.invokers.TestInvoker.runConfigMethods(TestInvoker.java:846)
	at org.testng.internal.invokers.TestInvoker.runAfterConfigurations(TestInvoker.java:815)
	at org.testng.internal.invokers.TestInvoker.invokeMethod(TestInvoker.java:633)
	at org.testng.internal.invokers.TestInvoker.invokeTestMethod(TestInvoker.java:230)
	at org.testng.internal.invokers.MethodRunner.runInSequence(MethodRunner.java:63)
	at org.testng.internal.invokers.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:1005)
	at org.testng.internal.invokers.TestInvoker.invokeTestMethods(TestInvoker.java:203)
	at org.testng.internal.invokers.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:154)
	at org.testng.internal.invokers.TestMethodWorker.run(TestMethodWorker.java:134)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at org.testng.TestRunner.privateRun(TestRunner.java:744)
	at org.testng.TestRunner.run(TestRunner.java:616)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:421)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:413)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:373)
	at org.testng.SuiteRunner.run(SuiteRunner.java:312)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:95)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1274)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1208)
	at org.testng.TestNG.runSuites(TestNG.java:1112)
	at org.testng.TestNG.run(TestNG.java:1079)
	at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:65)
	at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:109)

^ This failure happens on each test method