BAEL-9567 Align module names, folder names and artifact id

- Added "name" in pom.xml whereever it was missing and aligned the present ones with the artifactid and foldername

guava-modules/guava-18/pom.xml

@@ -2,10 +2,10 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <artifactId>guava-18</artifactId>
     <version>0.1.0-SNAPSHOT</version>
-
+    <name>guava-18</name>
+    
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-java</artifactId>

guava-modules/guava-19/pom.xml

@@ -2,10 +2,10 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <artifactId>guava-19</artifactId>
     <version>0.1.0-SNAPSHOT</version>
-
+    <name>guava-19</name>
+    
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-java</artifactId>

guava-modules/guava-21/pom.xml

@@ -4,7 +4,8 @@
     <modelVersion>4.0.0</modelVersion>
     <artifactId>guava-21</artifactId>
     <version>1.0-SNAPSHOT</version>
-
+    <name>guava-21</name>
+    
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-java</artifactId>