Merge pull request #607 from oracle/develop-70525

Update prerequisites documentation

Author: markxnelson

README.md

@@ -45,7 +45,7 @@ Before using the operator, you might want to read the [design philosophy](site/d
 
 *	Kubernetes 1.10.11+, 1.11.5+, and 1.12.3+  (check with `kubectl version`).
 *	Flannel networking v0.9.1-amd64 (check with `docker images | grep flannel`)
-*	Docker 17.03.1.ce (check with `docker version`)
+*	Docker 18.03.1.ce (check with `docker version`)
 *	Oracle WebLogic Server 12.2.1.3.0
 
 ## Set up your Kubernetes cluster

site/developer.md

@@ -4,12 +4,11 @@ This guide provides information for developers who wish to understand or contrib
 
 ## Requirements
 
-The following software is required to obtain and build the operator:
+In addition to the requirements listed in [README](../README.md#prerequisites), the following software is also required to obtain and build the operator:
 
 *	Git (1.8 or later recommended)
+* Java Developer Kit (1.8u131 or later recommended, please use 1.8, tests will not work on 1.9 or later versions)
 *	Apache Maven (3.3 or later recommended)
-*	Java Developer Kit (1.8u131 or later recommended, not 1.9)
-*	Docker 17.03.1.ce
 
 The operator is written primarily in Java and BASH shell scripts.  The Java code uses features introduced in Java 1.8 -- for example, closures -- but does not use any Java 1.9 feature.
 

site/installation.md

@@ -52,12 +52,10 @@ When the run completes successfully, the Docker image for the operator will be b
 
 ## Build the Docker image for the operator locally
 
-The following software is required to obtain and build the operator:
+In addition to the requirements listed in [README](../README.md#prerequisites), the following software is also required to obtain and build the operator:
 
 *    Git (1.8 or later recommended)
 *    Apache Maven (3.3 or later recommended)
-*    Java Developer Kit (1.8u131 or later recommended, not 1.9)
-*    Docker 17.03.1.ce
 
 To run the operator in a Kubernetes cluster, you need to build the Docker image and then deploy it to your cluster.  The operator is built using Apache Maven, which must be installed first.  Maven may be downloaded from the [Apache Maven site](http://maven.apache.org).  The GitHub repository should be cloned locally: