DO_NOT_MERGE Makefile: set CODE_GENERATOR_VER to XXX_TODO temporarily

Using locally built code-generator.

    TODO: set this to a real version once kcp-dev/code-generator#98
    is merged!

On-behalf-of: SAP robert.vasek@sap.com
Signed-off-by: Robert Vasek <robert.vasek@clyso.com>

Author: gman0

Makefile

@@ -72,7 +72,7 @@ LOGCHECK_BIN := logcheck
 LOGCHECK := $(TOOLS_GOBIN_DIR)/$(LOGCHECK_BIN)
 export LOGCHECK # so hack scripts can use it
 
-CODE_GENERATOR_VER := v2.3.0
+CODE_GENERATOR_VER := XXX_TODO
 CODE_GENERATOR_BIN := code-generator
 CODE_GENERATOR := $(TOOLS_GOBIN_DIR)/$(CODE_GENERATOR_BIN)
 export CODE_GENERATOR # so hack scripts can use it