[travis] Travis CI add oraclejdk9 (#1023)

* Add oraclejdk9 to .travis.yml

* Upgrade maven-compiler-plugin

* Exclude jdk.tools from hadoop dependency

.travis.yml

@@ -20,6 +20,7 @@
 language: java
 
 jdk:
+  - oraclejdk9
   - oraclejdk8
   - openjdk7
 

accumulo/pom.xml

@@ -44,6 +44,12 @@ LICENSE file.
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-common</artifactId>
       <version>${hadoop.version}</version>
+      <exclusions>
+        <exclusion>
+          <groupId>jdk.tools</groupId>
+          <artifactId>jdk.tools</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
     <dependency>
       <groupId>com.yahoo.ycsb</groupId>

hbase098/pom.xml

@@ -33,6 +33,12 @@ LICENSE file.
       <groupId>org.apache.hbase</groupId>
       <artifactId>hbase-client</artifactId>
       <version>${hbase098.version}</version>
+      <exclusions>
+        <exclusion>
+          <groupId>jdk.tools</groupId>
+          <artifactId>jdk.tools</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
     <dependency>
       <groupId>com.yahoo.ycsb</groupId>

pom.xml

@@ -186,7 +186,7 @@ LICENSE file.
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.3</version>
+        <version>3.7.0</version>
         <configuration>
           <source>1.7</source>
           <target>1.7</target>

solr/pom.xml

@@ -65,6 +65,12 @@ LICENSE file.
       <artifactId>solr-test-framework</artifactId>
       <version>${solr.version}</version>
       <scope>test</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>jdk.tools</groupId>
+          <artifactId>jdk.tools</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
   </dependencies>
 </project>

solr6/pom.xml

@@ -65,6 +65,12 @@ LICENSE file.
       <artifactId>solr-test-framework</artifactId>
       <version>${solr6.version}</version>
       <scope>test</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>jdk.tools</groupId>
+          <artifactId>jdk.tools</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
   </dependencies>