[maven] rename maven names for parent, dev-tools and rest spec

Follow up for previous commit:

```
[INFO] Build Tools and Resources .......................... SUCCESS [  0.158 s]
[INFO] Rest API Specification ............................. SUCCESS [  0.002 s]
[INFO] Elasticsearch Parent POM ........................... SUCCESS [  0.122 s]
```

dev-tools/pom.xml

@@ -3,7 +3,7 @@
   <groupId>org.elasticsearch</groupId>
   <artifactId>elasticsearch-dev-tools</artifactId>
   <version>2.1.0-SNAPSHOT</version>
-  <name>Elasticsearch Build Resources</name>
+  <name>Build Tools and Resources</name>
   <description>Tools to assist in building and developing in the Elasticsearch project</description>
   <parent>
       <groupId>org.sonatype.oss</groupId>

pom.xml

@@ -9,7 +9,7 @@
     <version>2.1.0-SNAPSHOT</version>
     <packaging>pom</packaging>
     <name>Elasticsearch Parent POM</name>
-    <description>Elasticsearch Parent POM</description>
+    <description>Parent POM</description>
     <inceptionYear>2009</inceptionYear>
 
     <parent>

rest-api-spec/pom.xml

@@ -3,7 +3,7 @@
   <groupId>org.elasticsearch</groupId>
   <artifactId>elasticsearch-rest-api-spec</artifactId>
   <version>2.1.0-SNAPSHOT</version>
-  <name>Elasticsearch Rest API Spec</name>
+  <name>Rest API Specification</name>
   <description>REST API Specification and tests for use with the Elasticsearch REST Test framework</description>
   <parent>
       <groupId>org.sonatype.oss</groupId>