gnu: Disable parallel tests.

* gnu/packages/aidc.scm (zint),
* gnu/packages/calendar.scm (libical),
* gnu/packages/compression.scm (c-blosc2, minizip-ng),
* gnu/packages/cpp.scm (cpp-httplib),
* gnu/packages/engineering.scm (libmedfile),
* gnu/packages/gnome.scm (evolution-data-server),
* gnu/packages/image-processing.scm (opencv),
* gnu/packages/kde-frameworks.scm (kservice),
* gnu/packages/maths.scm (scotch),
* gnu/packages/networking.scm (restbed, restinio, srt),
* gnu/packages/tbb.scm (tbb),
* gnu/packages/tls.scm (mbedtls-lts),
* gnu/packages/vulkan.scm (vulkan-loader),
* gnu/packages/web.scm (websocketpp)
[arguments]<#:parallel-tests?>: Disable.

Change-Id: I88334deb4afc29ab84b279e9d1759a777ddd49dd

gnu/packages/networking.scm

@@ -726,7 +726,8 @@ from any network device in any of three ASCII graph formats.")
         (base32 "1zr1l9zkai7rpw9cn5j9h4zrv08hgpfmwscwyscf2j4cgwf0rxrr"))))
     (build-system cmake-build-system)
     (arguments
-     `(#:configure-flags
+     `(#:parallel-tests? #f
+       #:configure-flags
        (list
         (string-append "-DCMAKE_INSTALL_BINDIR="
                        (assoc-ref %outputs "out") "/bin")
@@ -3887,7 +3888,10 @@ never see any machines other than the one Dante is running on.")
     (inputs
      (list asio catch-framework openssl))
     (arguments
-     `(#:configure-flags
+     `(;; Running parallel tests results in "bind: Address already in use" error
+       ;; in test service_status_feature_test_suite.
+       #:parallel-tests? #f
+       #:configure-flags
        '("-DBUILD_SSL=NO")
        #:phases
        (modify-phases %standard-phases
@@ -3932,6 +3936,8 @@ communication over HTTP.")
     (build-system cmake-build-system)
     (arguments
      (list
+      ;; Error when tests are run in parallel: "bind: Address already in use".
+      #:parallel-tests? #f
       #:configure-flags
       #~(list "-DRESTINIO_INSTALL=ON"
               "-DRESTINIO_TEST=ON"