provider.sh: Call prepare_config in the build funtion.
provider.sh: Call prepare_config in the build funtion.

Set up the configuration before starting the
code and manifest build. 

Signed-off-by: 999c49cfb934a76e4a09f5b501ffc662df406035@in.ibm.com
davidvossel/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,stu-gott/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt