Fix the build for Ubuntu: ensure method use instead of property access in the gradle script.

Author: jasoma

activejdbc-gradle-plugin/build.gradle

@@ -75,18 +75,18 @@ class TestProjectBuild extends Exec {
 
     @Override
     protected void exec() {
-        workingDir = 'test-project'
-
+        workingDir('test-project')
+        def buildArgs = []
         if (Os.isFamily(Os.FAMILY_WINDOWS)) {
-            commandLine = ['cmd', '/c', '..\\gradlew.bat']
+            executable('cmd')
+            buildArgs += ['/c', '..\\gradlew.bat']
         } else {
-            commandLine = ['../gradlew']
+            executable('../gradlew')
         }
 
         def daemonArg = (useDaemon) ? '--daemon' : '--no-daemon'
-        [daemonArg, '--stacktrace', "-Pactivejdbc.version=${project.version}", 'test'].each { arg ->
-            commandLine = commandLine + arg
-        }
+        buildArgs += [daemonArg, '--stacktrace', "-Pactivejdbc.version=${project.version}", 'test']
+        args(buildArgs)
 
         super.exec()
     }

activejdbc-gradle-plugin/test-project/build.gradle

@@ -2,6 +2,7 @@ buildscript {
     repositories {
         mavenCentral()
         mavenLocal()
+        maven { url 'http://repo.javalite.io' }
     }
     dependencies {
         classpath "org.javalite:activejdbc-gradle-plugin:${property('activejdbc.version')}"