Update regex to have constraint regex in quotes

Author: KostasTsiounis

closed/src/java.base/share/classes/openj9/internal/security/RestrictedSecurity.java

@@ -872,7 +872,7 @@ boolean isRestrictedServiceAllowed(Service service, boolean isServiceAdded) {
                 // See if a regex for accepted uses has been specified and apply
                 // it to the call stack.
                 if (!isServiceAdded && !isNullOrBlank(cAcceptedUses)) {
-                    cAcceptedUses = cAcceptedUses.substring(1).strip();
+                    cAcceptedUses = cAcceptedUses.substring(1).strip().substring(1, cAcceptedUses.length());
                     StackTraceElement[] stackElements = Thread.currentThread().getStackTrace();
                     String stackTrace = Stream.of(stackElements)
                                               .map(se -> se.toString())
@@ -1493,7 +1493,7 @@ private void setConstraints(String providerName, String providerInfo, boolean pr
             final String typeRE = "\\w+";
             final String algoRE = "[A-Za-z0-9./_-]+";
             final String attrRE = "[A-Za-z0-9=*|.:]+";
-            final String consRE = "\\{(" + typeRE + "),(" + algoRE + "),(" + attrRE + ")(,.+?)*\\}";
+            final String consRE = "\\{(" + typeRE + "),(" + algoRE + "),(" + attrRE + ")(,\\s+\".+?\")*\\}";
             p = Pattern.compile(
                 "\\["
                 + "([+-]?)"             // option to append or remove
@@ -1805,7 +1805,7 @@ private static void checkProviderFormat(String providerInfo, boolean update) {
                 + "(\\["                                // constraints [optional]
                     + "\\s*"
                     + "([+-])?"                         // action [optional]
-                    + "[A-Za-z0-9{}.=*|:?,/\\\\_\\s-]+"      // constraint definition
+                    + "\\{.+\\}"                        // constraint definition
                 + "\\])?"
                 + "\\s*"
                 + "$");