Allow changing the behavior for imported blocks (#5236)

* Added option to disable default block announce

* Added on_block_imported on NetworkService

* Revert "Added on_block_imported on NetworkService"

This reverts commit ba360cad96e0cb041d7047af30df2a35eb112449.

* Do not announce block if set to not announce block

* Revert fix

* Moving default announce block to NetworkConfig

* WIP

Forked at: ad90ab7ec9
Parent branch: origin/master

* WIP

Forked at: ad90ab7ec9
Parent branch: origin/master

* Removing boolean in favor of explicit call

* Fixing tests

* WIP

Forked at: ad90ab7ec9
Parent branch: origin/master

* WIP

Forked at: ad90ab7ec9
Parent branch: origin/master

* increase spec_version

* increase spec_version

* Fixed test

* Fixing test

* Renamed should_announce_imported_blocks to announce_imported_blocks

* Updated assert_cmd

substrate/Cargo.lock

@@ -178,15 +178,16 @@ dependencies = [
 
 [[package]]
 name = "assert_cmd"
-version = "0.12.1"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35ad62275a8bda1c2c9a9303aea121eb04204272d3be0735d5dc1f49eb9ff9a9"
+checksum = "36101401a715c232f2c63a534a4b639415064b79d128d2a60d35678f8fb45204"
 dependencies = [
  "doc-comment",
  "escargot",
  "predicates",
  "predicates-core",
  "predicates-tree",
+ "wait-timeout",
 ]
 
 [[package]]
@@ -8935,6 +8936,15 @@ dependencies = [
  "glob 0.2.11",
 ]
 
+[[package]]
+name = "wait-timeout"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "walkdir"
 version = "2.3.1"