Fix example for LOG_LEVEL in SmartRouter image

Fix example in LOG_LEVEL for SmartRouter image. In example is used value "DEBUG", when this value is used following warning was displayed in log: "�[0;33mWARN Log Level DEBUG is not allowed, the allowed levels are ALL CONFIG FINE FINER FINEST INFO OFF SEVERE WARNING�[0m"

Also please update example for LOG_CATEGORY, in this example is used name of the env. var as prefix. In example we should only place value there.
Actual example: "LOGGER_CATEGORIES='org.kie=DEBUG,org.apache=INFO,org.eclipse=INFO'"
expected example: "org.kie=DEBUG,org.apache=INFO,org.eclipse=INFO"

Expected result of this jira - replace example value for LOG_LEVEL with one listed above. and remove LOG_CATEGORY prefix from example