FAB-9043 Prepare fabric for 1.2 developerment

Update BASE_VERSION = 1.2.0, PREV_VERSION = 1.1.0 and
CHAINTOOL_VERSION = 1.1.0

Change-Id: I6913f5c3e4e62d9dff211c77ee3c3e005d3df9f2
Signed-off-by: rameshthoomu <rameshbabu.thoomu@gmail.com>

Author: rameshthoomu

Makefile

@@ -40,9 +40,9 @@
 #     use in the local machine.
 #   - docker-thirdparty - pulls thirdparty images (kafka,zookeeper,couchdb)
 
-BASE_VERSION = 1.1.0
-PREV_VERSION = 1.1.0-rc1
-CHAINTOOL_RELEASE=1.0.1
+BASE_VERSION = 1.2.0
+PREV_VERSION = 1.1.0
+CHAINTOOL_RELEASE=1.1.0
 BASEIMAGE_RELEASE=0.4.6
 
 # Allow to build as a submodule setting the main project to