[alibaba/druid]Update pom.xml 修复错误信息： 'dependencies.dependency.systemPath' for com.sun:tools:jar must specify an absolute path but is ${project.basedir}/lib/openjdk-1.8-tools.jar in com.alibaba:druid:1.2.6

修复错误信息： 'dependencies.dependency.systemPath' for com.sun:tools:jar must specify an absolute path but is ${project.basedir}/lib/openjdk-1.8-tools.jar in com.alibaba:druid:1.2.6 profile中的dependencies已存在根据不同的jdk依赖tools和jconsole.jar的逻辑了。 并且根绝${project.basedir} 引入非仓库的jar明显不合适