Move "Urns" utility class to another module. (linkedin#31)

This is need to avoid breaking LinkedIn's build.

core-models-utils/README.md

@@ -0,0 +1,6 @@
+Module which has utilities for core models, particularly URNs.
+
+This is a separate module from `core-models` due to a technical restriction. Everything in `core-models` is already
+defined at LinkedIn, we have essentially forked it in open source. So when we build internally, we need to actually
+ignore `core-models`, and use the internal definitions instead. So for anything that _isn't_ forked, i.e. these
+utilities, it needs to go into a separate module, or it would break LinkedIn's build, as they would be "missing".

core-models-utils/build.gradle

@@ -0,0 +1,7 @@
+apply plugin: 'java'
+
+apply from: "$rootDir/gradle/java-publishing.gradle"
+
+dependencies {
+  compile project(':core-models')
+}

core-models/src/main/javaPegasus/com/linkedin/common/urn/Urns.java → core-models-utils/src/main/java/com/linkedin/common/urn/Urns.java

@@ -17,7 +17,7 @@ private Urns() {
    *
    * <p>This differs from the {@link Urn#Urn(String, String)} (and {@link
    * Urn#createFromTypeSpecificString(String, String)}) in that this does not have a checked {@link
-   * java.net.URISyntaxException}, and instead will throw an {@link IllegalArgumentException} if the {@code
+   * URISyntaxException}, and instead will throw an {@link IllegalArgumentException} if the {@code
    * typeSpecificString} fails to parse.
    *
    * <p>The ideal usage for this is when calling this method with compile time constant strings that are known to be

dao-impl/ebean-dao/build.gradle

@@ -7,6 +7,7 @@ configurations {
 }
 
 dependencies {
+  compile project(':core-models-utils')
   compile project(':dao-api')
   compile externalDependency.ebean
   compile externalDependency.jsonSimple

restli-resources/build.gradle

@@ -13,6 +13,7 @@ dependencies {
 
   compileOnly externalDependency.lombok
 
+  testCompile project(':core-models-utils')
   testCompile project(':testing:core-models-testing')
   testCompile project(':testing:test-models')
   testCompile externalDependency.parseqTest

settings.gradle

@@ -1,4 +1,5 @@
 include 'core-models'
+include 'core-models-utils'
 include 'dao-api'
 include 'dao-impl:ebean-dao'
 include 'dao-impl:elasticsearch-dao'