Adjust "Update snakeyaml and jettison libs (#5144)"

The version range is causing issues in some
maven plugins w/ duplicate artifact resolution.

Author: onobc

spring-cloud-dataflow-rest-resource/pom.xml

@@ -63,7 +63,7 @@
 		<dependency>
 			<groupId>org.codehaus.jettison</groupId>
 			<artifactId>jettison</artifactId>
-			<version>[1.5.1,)</version>
+			<version>1.5.1</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>

spring-cloud-dataflow-shell-core/pom.xml

@@ -44,7 +44,7 @@
 		<dependency>
 			<groupId>org.yaml</groupId>
 			<artifactId>snakeyaml</artifactId>
-			<version>[1.31,)</version>
+			<version>1.31</version>
 		</dependency>
 		<dependency>
 			<groupId>io.codearte.props2yaml</groupId>

spring-cloud-dataflow-single-step-batch-job/pom.xml

@@ -48,7 +48,7 @@
 		<dependency>
 			<groupId>org.codehaus.jettison</groupId>
 			<artifactId>jettison</artifactId>
-			<version>[1.5.1,)</version>
+			<version>1.5.1</version>
 		</dependency>
 		<dependency>
 			<groupId>com.microsoft.sqlserver</groupId>