Louis job scheduler (#1197)

* Adds job repo
* Adds scheduler
* Adds plugin table which is a place holder for future expansion of the scheduler. Currently all jobs that are created are linked to the pi_system plugin which are jobs that are held in a local registeredJobs map populated at controller startup.

internal/errors/code_test.go

@@ -102,6 +102,11 @@ func TestCode_Both_String_Info(t *testing.T) {
 			c:    AccountAlreadyAssociated,
 			want: AccountAlreadyAssociated,
 		},
+		{
+			name: "InvalidJobRunState",
+			c:    InvalidJobRunState,
+			want: InvalidJobRunState,
+		},
 		{
 			name: "InternalError",
 			c:    Internal,