Replacing strange chars in pom.xml with spaces

They look weirder in the ASF Git [raw view](https://git-wip-us.apache.org/repos/asf?p=jclouds-labs-openstack.git;a=blob_plain;f=pom.xml;hb=master):

![image](https://f.cloud.github.com/assets/223702/1579743/abee54da-51a5-11e3-8a60-2c1111f48e7f.png)