activated new checkstyle plugin only if used java is at least 1.8

Author: wumpz

pom.xml

@@ -355,6 +355,7 @@
                 <property>
                     <name>!skipCheckSources</name>
                 </property>
+                <jdk>[1.8,)</jdk>
             </activation>
             <build>
                 <plugins>

src/test/java/net/sf/jsqlparser/statement/select/SelectTest.java

@@ -3613,4 +3613,10 @@ public void testGroupingSets3() throws JSQLParserException {
     public void testLongQualifiedNamesIssue763() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("SELECT mongodb.test.test.intField, postgres.test.test.intField, postgres.test.test.datefield FROM mongodb.test.test JOIN postgres.postgres.test.test ON mongodb.test.test.intField = postgres.test.test.intField WHERE mongodb.test.test.intField = 123");
     }
+
+    @Test
+    public void testLongQualifiedNamesIssue763_2() throws JSQLParserException {
+        Statement parse = CCJSqlParserUtil.parse(new StringReader("SELECT mongodb.test.test.intField, postgres.test.test.intField, postgres.test.test.datefield FROM mongodb.test.test JOIN postgres.postgres.test.test ON mongodb.test.test.intField = postgres.test.test.intField WHERE mongodb.test.test.intField = 123"));
+        System.out.println(parse.toString());
+    }
 }