TM : fix installation manual

Test-Management/installation.md

@@ -21,7 +21,7 @@ Here is a guide to help you with installing Test Management.
 
 # Pre-requisites
 
-Gazelle Test Management runs under Jboss AS 7.2.0 with a postgresql PostGresql 9.1 or higher database. For general considerations regarding the installation of the 
+Gazelle Test Management runs under Jboss AS 7.2.0 with a postgresql PostGresql 9.1 or higher database. For general considerations regarding the installation of the
 application server, read [Jboss7 installation guide](../General/jboss7.html).
 
 # Sources
@@ -49,6 +49,14 @@ Download the file containing all the data required by the application to properl
 pg_restore -U gazelle -h 127.0.0.1 -d your_database tm-first-import.data
 ```
 
+# Graphviz
+
+Gazelle Test Management need the package graphviz to display graph (Display relations between actors and transactions for a given integration profile)
+```bash
+sudo apt install graphviz
+```
+
+
 # Binary
 
 You can either fetch the public EAR (released version) in our [Nexus repository](https://gazelle.ihe.net/nexus/index.html#nexus-search;gav~~gazelle-tm-ear*~~~) or compile the tool by your own.
@@ -70,7 +78,7 @@ The archive (EAR) and the distribution file are created and placed into gazelle-
 
 Test Management requires JBoss 7.2.0 to have some additional libraries (see pre-requisites section).
 
-Since version 5.10.0, Before you start your Jboss server, you shall configure the datasource at `[YOUR_JBOSS_INSTALL]/standalone/configuration/standalone.xml`. 
+Since version 5.10.0, Before you start your Jboss server, you shall configure the datasource at `[YOUR_JBOSS_INSTALL]/standalone/configuration/standalone.xml`.
 Read details in the "Externalize datasources from tool projects" section of [JBoss 7 installation page](../General/jboss7.html).
 
 The datasource element to import in the standalone.xml file is available in the [project](https://gazelle.ihe.net/jenkins/view/Test%20Management/job/gazelle-tm-public/ws/gazelle-tm-ear/src/main/datasource/TestManagement-ds.xml).
@@ -89,11 +97,11 @@ Once you have copied the content of this file in your Jboss configuration:
     * min.pool.size = 1 and max.pool.size = 70 for the instance running at EU-CAT outside of connectathon periods and for intances using the __public__ profile
     * min.pool.size = 1 and max.pool.size = 30 for the Gazelle Master Model
     * min.pool.size = 1 and max.pool.size = 10 for the Product Registry and other instances
-    
+
 You can retrieve those values in [gazelle-tm's pom.xml file](https://gazelle.ihe.net/jenkins/view/Test%20Management/job/gazelle-tm-public/ws/pom.xml) for each profile.
-    
 
-Since version 5.11.0, you need to configure the mail session that is needed by the tool in the jboss configuration file `standalone.xml`. Read details in the "Externalize mail server configuration" section of [JBoss 7 installation page](../General/jboss7.html) for further information. 
+
+Since version 5.11.0, you need to configure the mail session that is needed by the tool in the jboss configuration file `standalone.xml`. Read details in the "Externalize mail server configuration" section of [JBoss 7 installation page](../General/jboss7.html) for further information.
 
 
 Copy the gazelle-tm.ear into the " standalone\\deployments" directory of your JBoss 7 server. Finally, start your server. When the application is deployed, open a browser and go to **http://yourserver/gazelle**. If the deployment and the database initialization are successful you should see the home page.