Fix test and add new env variable property

[ghost]

This handles issue #1 and #2

[haroon-sheikh]

@Takias thanks for the PR.

Can you please explain what the changes are?

From what I can understand, pom is now going to read properties from env/default.properties.

However, I'm looking to read properties within java code instead and if a properties is assigned to an environment variable example.property=${JAVA_HOME} for example, then example.property should output JAVA_HOME value. i.e. that's using System.getenv('JAVA_HOME') instead of System.getProperty('JAVA_HOME'). I hope this clarifies the requirements.

[ghost]

@haroon-sheikh I have added an example in the properties file which reads the PATH environment variable. Maven reads this from properties file and sets as a system property. See the pom.xml where the following section adds the system properties.

<configuration>
	<systemPropertyVariables>
		<my.Property>${property.package}</my.Property>
		<her.Property>${property.version}</her.Property>
		<my.pathvar>${pathvar}</my.pathvar>
	</systemPropertyVariables>
</configuration>

Then you can access the property using for e.g. System.getProperty("my.pathvar")