Allow running IT from alternate folder

Getting fatal error LNK1104: cannot open file 'it0031-push-deps-to-lowest-order-B-1.0-SNAPSHOT.lib'
You may see this error when the path for filename expands to more than 260 characters.
If needed, rearrange your directory structure or shorten your folder and file names to shorten the paths.

Provide property default to match plugin default, and allow setting alternate from command line

Author: GregDomjan

pom.xml

@@ -116,6 +116,7 @@
 
   <properties>
     <invoker.debug>false</invoker.debug>
+    <invoker.workspace>${project.build.directory}/it</invoker.workspace>
     <its.to.skip>dummy</its.to.skip>
     <mavenVersion>3.0.4</mavenVersion>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -541,6 +542,7 @@
             <artifactId>maven-invoker-plugin</artifactId>
             <version>3.2.0</version>
             <configuration>
+              <cloneProjectsTo>${invoker.workspace}</cloneProjectsTo>
               <properties>
                 <jna.nosys>true</jna.nosys>
               </properties>