AECORE-115 Assessment Merger

[YanWittmann]

Added Assessment inventory merger that creates VMD contexts based on Asset information form multiple inventories.

<plugin>
    <groupId>org.metaeffekt.core</groupId>
    <artifactId>ae-inventory-maven-plugin</artifactId>
    <version>HEAD-SNAPSHOT</version>

    <executions>
        <execution>
            <id>data-mirror</id>
            <goals>
                <goal>merge-inventories-assessment</goal>
            </goals>
            <configuration>
                <sourceInventory>input-inventory.xls</sourceInventory>

                <sourceInventoryBaseDir>input-dir</sourceInventoryBaseDir>
                <sourceInventoryIncludes>**/*.xls</sourceInventoryIncludes>
                <sourceInventoryExcludes>**/*.yaml</sourceInventoryExcludes>

                <targetInventory>merged.xls</targetInventory>
            </configuration>
        </execution>
    </executions>
</plugin>

[YanWittmann]