Rename from financer to financer-server

In fact this is the server part of the financer app, so the new name is
more fitting. Also adjust the group ID accordingly, so -server and
-client can reside in the same group.

Also add property parallelDeploymentVersion as the String version
comparison of the context version is a bit quirky on Tomcat.

pom.xml

@@ -11,12 +11,12 @@
         <relativePath/>
     </parent>
 
-    <groupId>de.77zzcx7</groupId>
-    <artifactId>financer</artifactId>
+    <groupId>de.77zzcx7.financer</groupId>
+    <artifactId>financer-server</artifactId>
     <version>1-SNAPSHOT</version>
     <packaging>${packaging.type}</packaging>
-
-    <name>financer</name>
+    <description>The server part of the financer application - a simple app to manage your personal finances</description>
+    <name>financer-server</name>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -25,6 +25,10 @@
         <java.version>1.9</java.version>
         <packaging.type>jar</packaging.type>
         <activeProfiles>hsqldb,dev</activeProfiles>
+        <!-- Property to define the parallel deployment version.
+             See e.g. https://tomcat.apache.org/tomcat-8.5-doc/config/context.html
+             Should be the same as the project.version but padded with zeros to six digits. -->
+        <parallelDeploymentVersion>000001</parallelDeploymentVersion>
     </properties>
 
     <dependencies>
@@ -97,7 +101,7 @@
     </dependencies>
 
     <build>
-        <finalName>financer</finalName>
+        <finalName>${project.artifactId}</finalName>
         <plugins>
             <plugin>
                 <groupId>org.springframework.boot</groupId>
@@ -163,7 +167,7 @@
                 <activeProfiles>postgres</activeProfiles>
             </properties>
             <build>
-                <finalName>financer##${project.version}</finalName>
+                <finalName>${project.artifactId}##${parallelDeploymentVersion}</finalName>
             </build>
             <dependencies>
                 <dependency>