L1-290: Set the inflation parameters (#1820)

# Description

The Community has decided that the AZERO cap should be equal to 520M
AZERO, and the first year issuance equal to 27M AZERO.

The launch of the new inflation model is scheduled for October 14th. The
estimated total issuance at launch date is 373,948,365 AZERO.

Thus, the inflation horizon is set to 154,283,512,497 milliseconds
(approx. 1785 days).

## Type of change

- Breaking change (fix or feature that would cause existing
functionality to not work as expected)

# Checklist:

- I have added tests

aleph-client/src/aleph_zero.rs

@@ -2076,9 +2076,9 @@ pub mod api {
             .hash();
         runtime_metadata_hash
             == [
-                111u8, 233u8, 121u8, 88u8, 247u8, 52u8, 135u8, 105u8, 167u8, 108u8, 97u8, 139u8,
-                177u8, 122u8, 62u8, 130u8, 3u8, 106u8, 117u8, 91u8, 223u8, 244u8, 111u8, 47u8,
-                35u8, 184u8, 0u8, 203u8, 98u8, 253u8, 156u8, 92u8,
+                46u8, 76u8, 121u8, 124u8, 214u8, 182u8, 28u8, 12u8, 114u8, 169u8, 159u8, 10u8,
+                128u8, 9u8, 179u8, 188u8, 124u8, 56u8, 110u8, 108u8, 24u8, 15u8, 236u8, 3u8, 213u8,
+                142u8, 207u8, 48u8, 23u8, 113u8, 170u8, 43u8,
             ]
     }
     pub mod system {
@@ -9517,10 +9517,10 @@ pub mod api {
                         "AzeroCap",
                         vec![],
                         [
-                            68u8, 239u8, 10u8, 241u8, 109u8, 153u8, 129u8, 3u8, 237u8, 251u8,
-                            251u8, 221u8, 156u8, 81u8, 117u8, 166u8, 101u8, 196u8, 227u8, 176u8,
-                            209u8, 123u8, 127u8, 146u8, 252u8, 88u8, 138u8, 227u8, 183u8, 117u8,
-                            148u8, 36u8,
+                            232u8, 50u8, 48u8, 200u8, 187u8, 205u8, 197u8, 195u8, 172u8, 140u8,
+                            72u8, 253u8, 63u8, 190u8, 23u8, 70u8, 154u8, 96u8, 238u8, 203u8, 39u8,
+                            129u8, 219u8, 220u8, 119u8, 214u8, 95u8, 174u8, 65u8, 80u8, 25u8,
+                            156u8,
                         ],
                     )
                 }
@@ -9538,10 +9538,10 @@ pub mod api {
                         "ExponentialInflationHorizon",
                         vec![],
                         [
-                            7u8, 241u8, 156u8, 243u8, 174u8, 255u8, 212u8, 252u8, 53u8, 59u8,
-                            145u8, 100u8, 166u8, 17u8, 167u8, 127u8, 41u8, 227u8, 188u8, 149u8,
-                            207u8, 61u8, 65u8, 215u8, 42u8, 241u8, 18u8, 145u8, 24u8, 123u8, 1u8,
-                            65u8,
+                            96u8, 228u8, 98u8, 28u8, 209u8, 210u8, 67u8, 181u8, 1u8, 111u8, 174u8,
+                            131u8, 254u8, 131u8, 238u8, 112u8, 243u8, 203u8, 160u8, 240u8, 65u8,
+                            141u8, 108u8, 235u8, 114u8, 44u8, 115u8, 114u8, 135u8, 217u8, 90u8,
+                            63u8,
                         ],
                     )
                 }

e2e-tests/src/test/era_payout.rs

@@ -69,8 +69,8 @@ async fn force_era_payout(config: &Config) -> anyhow::Result<()> {
     // These must be adjusted every time we change the default values of:
     // * AzeroCap
     // * ExponentialInflationHorizon
-    let expected_payout = 1776 * TOKEN;
-    let delta = 3 * TOKEN;
+    let expected_payout = 114 * TOKEN;
+    let delta =  TOKEN;
 
     assert_within_delta_interval(
         expected_era_duration,
@@ -101,8 +101,8 @@ async fn normal_era_payout(config: &Config) -> anyhow::Result<()> {
     // These must be adjusted every time we change the default values of:
     // * AzeroCap
     // * ExponentialInflationHorizon
-    let expected_payout = 1776 * TOKEN;
-    let delta = 3 * TOKEN;
+    let expected_payout = 114 * TOKEN;
+    let delta = TOKEN;
 
     assert_within_delta_interval(
         expected_era_duration,

pallets/aleph/src/lib.rs

@@ -73,15 +73,14 @@ pub mod pallet {
     /// Default AZERO Cap. Relevant for eras before we set this value by hand.
     #[pallet::type_value]
     pub fn DefaultAzeroCap() -> Balance {
-        1_000_000_000 * TOKEN
+        520_000_000 * TOKEN
     }
 
     /// Default length of the exponential inflation horizon.
     /// Relevant for eras before we set this value by hand.
     #[pallet::type_value]
     pub fn DefaultExponentialInflationHorizon() -> u64 {
-        const MILLISECS_PER_YEAR: u64 = 1000 * 3600 * 24 * 36525 / 100;
-        MILLISECS_PER_YEAR
+        154_283_512_497
     }
 
     #[pallet::storage]