do not prepare/run pylint when skipTests

Author: Vladimir Kotal

opengrok-tools/pom.xml

@@ -133,6 +133,7 @@ Portions Copyright (c) 2017-2018, Chris Fraire <[email protected]>.
                                 <argument>${project.build.sourceDirectory}</argument>
                                 <argument>setup.py</argument>
                             </arguments>
+                            <skip>${skipTests}</skip>
                         </configuration>
                         <phase>verify</phase>
                         <goals>
@@ -210,6 +211,7 @@ Portions Copyright (c) 2017-2018, Chris Fraire <[email protected]>.
                                 <argument>install</argument>
                                 <argument>pylint</argument>
                             </arguments>
+                            <skip>${skipTests}</skip>
                         </configuration>
                         <phase>verify</phase>
                         <goals>
@@ -226,6 +228,7 @@ Portions Copyright (c) 2017-2018, Chris Fraire <[email protected]>.
                                 <argument>${project.build.sourceDirectory}/opengrok_tools</argument>
                                 <argument>${project.build.directory}/setup.py</argument>
                             </arguments>
+                            <skip>${skipTests}</skip>
                         </configuration>
                         <phase>verify</phase>
                         <goals>