Allow map keys to be surrounded by '[' in .properties file

See: https://github.com/spring-projects/sts4/issues/534

Signed-off-by: Kris De Volder <kdevolder@pivotal.io>

eclipse-language-servers/org.springframework.tooling.cloudfoundry.manifest.ls.feature/.project

@@ -6,8 +6,13 @@
 	</projects>
 	<buildSpec>
 		<buildCommand>
-			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
+			<triggers>full,incremental,</triggers>
 			<arguments>
+				<dictionary>
+					<key>LaunchConfigHandle</key>
+					<value>&lt;project&gt;/.externalToolBuilders/org.eclipse.m2e.core.maven2Builder.launch</value>
+				</dictionary>
 			</arguments>
 		</buildCommand>
 		<buildCommand>
@@ -17,7 +22,6 @@
 		</buildCommand>
 	</buildSpec>
 	<natures>
-		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.pde.FeatureNature</nature>
 	</natures>
 </projectDescription>