title: Plugin 'org.sonarlint.idea' failed to initialize and will be disabled. Please restart IntelliJ IDEA
body: <p>I am getting the error above when I try to install the <em>SonarLint</em> plugin on my <em>IntelliJ</em>.</p>
  <blockquote>
  <p>Mac OS X Yosemite 10.10.5</p>
  <p>IntelliJ 15.06</p>
  <p>SonarLint Plugin 2.2 (tried 2.1 also)</p>
  </blockquote>
  <p>My JDK is set to <code>1.8</code> but not sure what is causing the issue. Any help will be appreciated.</p>
  <pre><code>        Plugin 'org.sonarlint.idea' failed to initialize and will be disabled.  Please restart IntelliJ IDEA.
  
          com.intellij.diagnostic.PluginException: org/sonarlint/intellij/config/global/SonarLintGlobalSettings : Unsupported major.minor version 51.0 [Plugin: org.sonarlint.idea]
          at com.intellij.ide.plugins.cl.PluginClassLoader.b(PluginClassLoader.java:130)
          at com.intellij.ide.plugins.cl.PluginClassLoader.a(PluginClassLoader.java:77)
          at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:66)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
          at java.lang.Class.forName0(Native Method)
          at java.lang.Class.forName(Class.java:249)
          at com.intellij.openapi.components.impl.ComponentManagerImpl.a(ComponentManagerImpl.java:408)
          at com.intellij.openapi.components.impl.ComponentManagerImpl.init(ComponentManagerImpl.java:96)
          at com.intellij.openapi.application.impl.ApplicationImpl.load(ApplicationImpl.java:455)
          at com.intellij.openapi.application.impl.ApplicationImpl.load(ApplicationImpl.java:447)
          at com.intellij.idea.IdeaApplication.run(IdeaApplication.java:194)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at com.intellij.idea.MainImpl$1$1$1.run(MainImpl.java:60)
          at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
          at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:715)
          at java.awt.EventQueue.access$400(EventQueue.java:82)
          at java.awt.EventQueue$2.run(EventQueue.java:676)
          at java.awt.EventQueue$2.run(EventQueue.java:674)
          at java.security.AccessController.doPrivileged(Native Method)
          at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
          at java.awt.EventQueue.dispatchEvent(EventQueue.java:685)
          at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:361)
          at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
          at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
          at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
          at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
          at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
          at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
          Caused by: java.lang.UnsupportedClassVersionError: org/sonarlint/intellij/config/global/SonarLintGlobalSettings : Unsupported major.minor version 51.0
          at java.lang.ClassLoader.defineClass1(Native Method)
          at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:471)
          at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:260)
          at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:256)
          at com.intellij.util.lang.UrlClassLoader._findClass(UrlClassLoader.java:225)
          at com.intellij.ide.plugins.cl.PluginClassLoader.b(PluginClassLoader.java:124)
          ... 30 more
  </code></pre>