Adressing review - chaning DELETE_WORKSPACE_ON_FAILED_TEST to boolean.
Adressing review - chaning DELETE_WORKSPACE_ON_FAILED_TEST to boolean.

Signed-off-by: kkanova <f7e24cc435a7985ccad503f229963b23d4c9b729@redhat.com>

codenvy/che,davidfestal/che,davidfestal/che,codenvy/che,davidfestal/che,davidfestal/che,davidfestal/che,davidfestal/che,codenvy/che,davidfestal/che,davidfestal/che,codenvy/che,davidfestal/che,davidfestal/che