Update 2.x SDK log4j2 appender to not pull in log4j2 on its own (#2002)

* Update log4j2 appender

* Update lockfiles

* Need to support Java 7

* Fix unit tests

* Fix Jdbc smoke test

Author: trask

logging/log4j2/build.gradle

@@ -33,6 +33,8 @@ projectPomDescription = "This module provides a $project.msftAppInsights appende
 // endregion Publishing properties
 
 dependencies {
-    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.0'
+    compileOnly group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.0'
     annotationProcessor group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.0'
+
+    testImplementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.11.0'
 }

logging/log4j2/gradle/dependency-locks/runtimeClasspath.lockfile

@@ -16,8 +16,6 @@ eu.infomas:annotation-detector:3.0.5
 org.apache.commons:commons-lang3:3.7
 org.apache.httpcomponents:httpclient:4.5.3
 org.apache.httpcomponents:httpcore:4.4.6
-org.apache.logging.log4j:log4j-api:2.11.0
-org.apache.logging.log4j:log4j-core:2.11.0
 org.checkerframework:checker-compat-qual:2.5.2
 org.codehaus.mojo:animal-sniffer-annotations:1.17
 xmlpull:xmlpull:1.1.3.1

test/smoke/testApps/Jdbc/build.gradle

@@ -5,7 +5,7 @@ dependencies {
     compile aiWebJar
 
     compile group: 'org.hsqldb', name: 'hsqldb', version: '2.3.6' // 2.4.0+ requires Java 8+
-    compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.43' // the old agent did not support 8.x
+    compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.49' // the old agent did not support 8.x
     compile group: 'org.postgresql', name: 'postgresql', version: '42.2.5.jre7'
     compile group: 'com.microsoft.sqlserver', name: 'mssql-jdbc', version: '6.4.0.jre7' // 6.5.0+ requires Java 8+
 

test/smoke/testApps/Jdbc/src/main/java/com/microsoft/applicationinsights/smoketestapp/JdbcTestServlet.java

@@ -263,7 +263,12 @@ private static Connection getHsqldbConnection() throws Exception {
 
     private static Connection getMysqlConnection() throws Exception {
         String hostname = System.getenv("MYSQL");
-        return DriverManager.getConnection("jdbc:mysql://" + hostname + "/mysql?autoReconnect=true&useSSL=true&verifyServerCertificate=false", "root", "password");
+        return DriverManager.getConnection(
+                "jdbc:mysql://"
+                        + hostname
+                        + "/mysql?autoReconnect=true&useSSL=true&enabledTLSProtocols=TLSv1,TLSv1.1,TLSv1.2,TLSv1.3&verifyServerCertificate=false",
+                "root",
+                "password");
     }
 
     private static Connection getPostgresConnection() throws Exception {