Made the projectLocationURI in the tpd.xsd optional

Change-Id: I1d6d4c0392cfc0173c0aa9bde61fd07b264a5793
Signed-off-by: BenceJanosSzabo <bence.janos.szabo@ericsson.com>

etc/xsd/TPD.xsd

@@ -435,7 +435,7 @@
 			  <xs:element name="ReferencedProject" minOccurs="0" maxOccurs="unbounded">
 				<xs:complexType>
 					<xs:attribute name="name" type="xs:normalizedString" use="required" />
-					<xs:attribute name="projectLocationURI" type="xs:normalizedString" use="required" />
+					<xs:attribute name="projectLocationURI" type="xs:normalizedString" use="optional" />
 					<xs:attribute name="tpdName" type="xs:normalizedString" use="optional" />
 				</xs:complexType>
 			  </xs:element>