add try catch to julia test

- avoid failures because of network not test failures

Author: fabinsch

examples/julia/overview-simple.jl

@@ -1,13 +1,29 @@
 import Pkg
-Pkg.add("PyCall")
+try
+    Pkg.add("PyCall")
 
-using PyCall
-using Printf
+    using PyCall
+    using Printf
 
-proxsuite = pyimport("proxsuite")
-np = pyimport("numpy")
-spa = pyimport("scipy.sparse")
-slice(i,j) = pycall(pybuiltin("slice"), PyObject, i,j)
+    try
+        proxsuite = pyimport("proxsuite")
+        np = pyimport("numpy")
+        spa = pyimport("scipy.sparse")
+        slice(i, j) = pycall(pybuiltin("slice"), PyObject, i, j)
+
+        println("PyCall and Python modules imported successfully.")
+    catch err
+        @warn "Failed to import Python modules: $err"
+        println("Skipping the rest of the test due to missing Python dependencies.")
+        return # early exit
+    end
+catch err
+    @warn "Failed to add or use PyCall: $err"
+    println("Skipping the test due to package installation issues.")
+    return # early exit
+end
+
+println("PyCall setup completed successfully. Continuing with the test...")
 
 EPS = 1e-6
 # generate mixed random convex qp with size n