Replace Eclipse che with Eclipse Hawkbit in the EPL1.0 License page

Eclipse che has switched to use EPL 2.0 on Aug 1st 2018 UTC. 
This patch replaces Eclipse che with Eclipse Hawkbit in the EPL1.0 license introduction page.

Author: NutshellySima

_licenses/epl-1.0.txt

@@ -8,7 +8,7 @@ description: This commercially-friendly copyleft license provides the ability to
 how: Create a text file (typically named LICENSE or LICENSE.txt) in the root of your source code and copy the text of the license into the file.
 
 using:
-  - Eclipse Che: https://github.com/eclipse/che/blob/master/LICENSE
+  - Eclipse hawkBit: https://github.com/eclipse/hawkbit/blob/master/LICENSE
   - JUnit: https://github.com/junit-team/junit4/blob/master/LICENSE-junit.txt
   - openHAB: https://github.com/openhab/openhab-distro/blob/master/LICENSE