update application.properties to use connection string

Author: littleaj

test/smoke/testApps/SpringBootTest/src/main/resources/application.properties

@@ -1,6 +1,5 @@
 spring.application.name=SpringBootTest
-azure.application-insights.channel.in-process.endpoint-address=http://fakeingestion:60606/v2/track
-azure.application-insights.instrumentation-key=00000000-0000-0000-0000-cba987654321
+azure.application-insights.connection-string=InstrumentationKey=00000000-0000-0000-0000-cba987654321;IngestionEndpoint=http://fakeingestion:60606
 azure.application-insights.logger.level=TRACE
 azure.application-insights.default-modules.ProcessPerformanceCountersModule.enabled=false
 azure.application-insights.default-modules.JvmPerformanceCountersModule.enabled=false