Fixed bug in vault url format

Author: artem-v

vault/src/main/java/io/scalecube/security/vault/VaultServiceRolesInstaller.java

@@ -269,14 +269,14 @@ private static String createTemplate(List<String> permissions) {
 
   private String buildVaultIdentityKeyUri(String keyName) {
     return new StringJoiner("/", vaultAddress, "")
-        .add("v1/identity/oidc/key")
+        .add("/v1/identity/oidc/key")
         .add(keyName)
         .toString();
   }
 
   private String buildVaultIdentityRoleUri(String roleName) {
     return new StringJoiner("/", vaultAddress, "")
-        .add("v1/identity/oidc/role")
+        .add("/v1/identity/oidc/role")
         .add(roleName)
         .toString();
   }

vault/src/main/java/io/scalecube/security/vault/VaultServiceTokenSupplier.java

@@ -163,7 +163,7 @@ private static void verifyOk(int status) {
 
   private String buildServiceTokenUri(Map<String, String> tags) {
     return new StringJoiner("/", vaultAddress, "")
-        .add("v1/identity/oidc/token")
+        .add("/v1/identity/oidc/token")
         .add(serviceTokenNameBuilder.apply(serviceRole, tags))
         .toString();
   }