fix: Work-around for collision with IID's generated by Symfony parser

Author: rsenden

src/main/java/com/fortify/ssc/parser/php/security_checker/parser/VulnerabilitiesParser.java

@@ -84,14 +84,16 @@ private final void buildVulnerabilityForDependency(String dependencyName, String
 	}
 
 	/**
-	 * Calculate the issue instance id, using a combination of feature name, feature version, and vulnerability name
+	 * Calculate the issue instance id, using a combination of feature name, feature version, and vulnerability name.
+	 * The calculated instance id is prepended with a 'P' to avoid collision with IID's generated by the legacy Symfony
+	 * Security Checker parser plugin.
 	 */
 	private final String getInstanceId(String dependencyName, String dependencyVersion, DependencyAdvisory dependencyAdvisory) {
 		String cveOrTitleOrLink = getFirstNonBlank(
 				dependencyAdvisory.getCve(),
 				dependencyAdvisory.getTitle(),
 				dependencyAdvisory.getLink());
-		return DigestUtils.sha256Hex(String.join("|", dependencyName, dependencyVersion, cveOrTitleOrLink));
+		return 'P'+DigestUtils.sha256Hex(String.join("|", dependencyName, dependencyVersion, cveOrTitleOrLink));
 	}
 
 	private final String getFirstNonBlank(String... strings) {