update maven in appveyor

Author: frantuma

appveyor.yml

@@ -9,19 +9,19 @@ install:
       Add-Type -AssemblyName System.IO.Compression.FileSystem
       if (!(Test-Path -Path "C:\maven" )) {
         (new-object System.Net.WebClient).DownloadFile(
-          'http://www.us.apache.org/dist/maven/maven-3/3.2.5/binaries/apache-maven-3.2.5-bin.zip',
+          'http://www.us.apache.org/dist/maven/maven-3/3.5.4/binaries/apache-maven-3.5.4-bin.zip',
           'C:\maven-bin.zip'
         )
         [System.IO.Compression.ZipFile]::ExtractToDirectory("C:\maven-bin.zip", "C:\maven")
       }
-  - cmd: SET PATH=C:\maven\apache-maven-3.2.5\bin;%JAVA_HOME%\bin;%PATH%
+  - cmd: SET PATH=C:\maven\apache-maven-3.5.4\bin;%JAVA_HOME%\bin;%PATH%
   - cmd: SET MAVEN_OPTS=-XX:MaxPermSize=2g -Xmx4g
   - cmd: SET JAVA_OPTS=-XX:MaxPermSize=2g -Xmx4g
-  - cmd: SET M2_HOME=C:\maven\apache-maven-3.2.5
+  - cmd: SET M2_HOME=C:\maven\apache-maven-3.5.4
   - cmd: dir/w
 #  - cmd: RMDIR "C:\projects\swagger-codegen\swagger-samples" /S /Q
   - git clone https://github.com/wing328/swagger-samples
-  - ps: Start-Process -FilePath 'C:\maven\apache-maven-3.2.5\bin\mvn' -ArgumentList 'jetty:run' -WorkingDirectory "$env:appveyor_build_folder\swagger-samples\java\java-jersey-jaxrs-ci"
+  - ps: Start-Process -FilePath 'C:\maven\apache-maven-3.5.4\bin\mvn' -ArgumentList 'jetty:run' -WorkingDirectory "$env:appveyor_build_folder\swagger-samples\java\java-jersey-jaxrs-ci"
 build_script:
   # build C# API client
   - nuget restore samples\client\petstore\csharp\SwaggerClient\IO.Swagger.sln