fix loading account JSON if not specified

Signed-off-by: Jakub Sokołowski <jakub@status.im>

tasks/generate.yml

@@ -69,15 +69,17 @@
         group: docker
         state: link
 
-    - name: Geth | Save account address
-      slurp:
-        src: '{{ geth_account_json_file }}'
-      register: geth_account
+- name: Geth | Save account address
+  slurp:
+    src: '{{ geth_account_json_file }}'
+  when: geth_account_json is not defined
+  register: geth_account
+
+- name: Geth | Extract account JSON
+  set_fact:
+    geth_account_json: '{{ (geth_account.content | b64decode | from_json) }}'
+  when: geth_account_json is not defined
 
-    - name: Geth | Extract account JSON
-      set_fact:
-        geth_account_json: '{{ (geth_account.content | b64decode | from_json) }}'
-    
 - name: Geth | Extract account address
   set_fact:
     geth_account_addr: '{{ geth_account_json["address"] }}'