Update yarn dir structure macros

Author: jvalkeal

create_directory_structure_yarn_hello.adoc

@@ -3,6 +3,7 @@
 ifndef::yarn_base_appmaster[:yarn_base_appmaster: appmaster]
 ifndef::yarn_base_container[:yarn_base_container: container]
 ifndef::yarn_base_client[:yarn_base_client: client]
+ifndef::yarn_base_dist[:yarn_base_dist: dist]
 
 === Create the directory structure
 
@@ -25,13 +26,14 @@ subdirectory structure:
 ├           └── java
 ├               └── hello
 ├                   └── container
-└── {yarn_base_client}
-    └── src
-        └── main
-            ├── resources
-            └── java
-                └── hello
-                    └── client
+├── {yarn_base_client}
+├   └── src
+├       └── main
+├           ├── resources
+├           └── java
+├               └── hello
+├                   └── client
+└── {yarn_base_dist}
 ```
 
 for example, with
@@ -44,6 +46,7 @@ mkdir -p {yarn_base_container}/src/main/resources
 mkdir -p {yarn_base_container}/src/main/java/hello/container
 mkdir -p {yarn_base_client}/src/main/resources
 mkdir -p {yarn_base_client}/src/main/java/hello/client
+mkdir -p {yarn_base_dist}
 ```
 on *nix systems:
 

create_directory_structure_yarn_test_hello.adoc

@@ -3,6 +3,7 @@
 ifndef::yarn_base_appmaster[:yarn_base_appmaster: appmaster]
 ifndef::yarn_base_container[:yarn_base_container: container]
 ifndef::yarn_base_client[:yarn_base_client: client]
+ifndef::yarn_base_dist[:yarn_base_dist: dist]
 
 === Create the directory structure
 
@@ -32,10 +33,11 @@ subdirectory structure:
 ├           └── java
 ├               └── hello
 ├                   └── client
-└── src
-    └── test
-        └── java
-            └── hello
+└── {yarn_base_dist}
+    └── src
+        └── test
+            └── java
+                └── hello
 ```
 
 for example, with
@@ -48,7 +50,7 @@ mkdir -p {yarn_base_container}/src/main/resources
 mkdir -p {yarn_base_container}/src/main/java/hello/container
 mkdir -p {yarn_base_client}/src/main/resources
 mkdir -p {yarn_base_client}/src/main/java/hello/client
-mkdir -p src/test/java/hello
+mkdir -p {yarn_base_dist}/src/test/java/hello
 ```
 on *nix systems: